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Academic literature on the topic 'Icehouse'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Icehouse"

1

Porter, Joe Ashby. "Fiction: Icehouse Burgess." Yale Review 88, no. 3 (July 2000): 101–10. http://dx.doi.org/10.1111/0044-0124.00419.

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Thomas, Ellen. "Descent into the Icehouse." Geology 36, no. 2 (2008): 191. http://dx.doi.org/10.1130/focus022008.1.

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Pekar, Stephen F. "When did the icehouse cometh?" Nature 455, no. 7213 (October 2008): 602–3. http://dx.doi.org/10.1038/455602a.

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4

Montañez, Isabel Patricia. "Current synthesis of the penultimate icehouse and its imprint on the Upper Devonian through Permian stratigraphic record." Geological Society, London, Special Publications 512, no. 1 (September 29, 2021): 213–45. http://dx.doi.org/10.1144/sp512-2021-124.

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AbstractIcehouses are the less common climate state on Earth, and thus it is notable that the longest-lived (c.370 to 260 Ma) and possibly most extensive and intense of icehouse periods spanned the Carboniferous Period. Mid- to high-latitude glaciogenic deposits reveal a dynamic glaciation–deglaciation history with ice waxing and waning from multiple ice centres and possible transcontinental ice sheets during the apex of glaciation. New high-precision U–Pb ages confirm a hypothesized west-to-east progression of glaciation through the icehouse, but reveal that its demise occurred as a series of synchronous and widespread deglaciations. The dynamic glaciation history, along with repeated perturbations to Earth System components, are archived in the low-latitude stratigraphic record, revealing similarities to the Cenozoic icehouse. Further assessing the phasing between climate, oceanographic, and biotic changes during the icehouse requires additional chronostratigraphic constraints. Astrochronology permits the deciphering of time, at high resolution, in the late Paleozoic record as has been demonstrated in deep- and quiet-water deposits. Rigorous testing for astronomical forcing in low-latitude cyclothemic successions, which have a direct link to higher-latitude glaciogenic records through inferred glacioeustasy, however, will require a comprehensive approach that integrates new techniques with further optimization and additional independent age constraints given challenges associated with shallow-marine to terrestrial records.
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Burgess, Peter M., Jinyu Zhang, and Ronald Steel. "Narrow is normal: Exploring the extent and significance of flooded marine shelves in icehouse, transitional, and greenhouse climate settings." Geology 50, no. 4 (January 18, 2022): 496–99. http://dx.doi.org/10.1130/g49468.1.

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Abstract Marine shelves are a ubiquitous feature of modern Earth, developed across a wide range of scales in many sedimentary basins and representing the flooded portion of basin-margin clinoform topsets. Analysis of 80 clinoforms from 10 basins spanning Cenozoic and Mesozoic icehouse, transitional, and greenhouse climate settings indicates that normalized mean greenhouse marine shelf width is 33% of normalized mean total measured clinoform topset length. The equivalent value for transitional settings is 43%, and 72% for icehouse marine shelves. These values demonstrate that greenhouse marine shelves were substantially narrower than icehouse equivalents, suggesting that narrower shelves with persistent shelf-edge deltas were a consequence of lower rates of accommodation change in greenhouse climate intervals that lacked the large ice sheets required to drive high-amplitude high-frequency glacio-eustasy. Because greenhouse climates have been the dominant mode through Earth history, narrow shelves have probably been the dominant form, and conceptual models based on modern relatively wide shelves may be poor predictors of paleogeography, sediment routing, and sediment partitioning throughout much of Earth history.
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Algeo, T. J., P. A. Meyers, R. S. Robinson, H. Rowe, and G. Q. Jiang. "Icehouse–greenhouse variations in marine denitrification." Biogeosciences 11, no. 4 (February 27, 2014): 1273–95. http://dx.doi.org/10.5194/bg-11-1273-2014.

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Abstract. Long-term secular variation in the isotopic composition of seawater fixed nitrogen (N) is poorly known. Here, we document variation in the N-isotopic composition of marine sediments (δ15Nsed) since 660 Ma (million years ago) in order to understand major changes in the marine N cycle through time and their relationship to first-order climate variation. During the Phanerozoic, greenhouse climate modes were characterized by low δ15Nsed (∼−2 to +2‰) and icehouse climate modes by high δ15Nsed (∼+4 to +8‰). Shifts toward higher δ15Nsed occurred rapidly during the early stages of icehouse modes, prior to the development of major continental glaciation, suggesting a potentially important role for the marine N cycle in long-term climate change. Reservoir box modeling of the marine N cycle demonstrates that secular variation in δ15Nsed was likely due to changes in the dominant locus of denitrification, with a shift in favor of sedimentary denitrification during greenhouse modes owing to higher eustatic (global sea-level) elevations and greater on-shelf burial of organic matter, and a shift in favor of water-column denitrification during icehouse modes owing to lower eustatic elevations, enhanced organic carbon sinking fluxes, and expanded oceanic oxygen-minimum zones. The results of this study provide new insights into operation of the marine N cycle, its relationship to the global carbon cycle, and its potential role in modulating climate change at multimillion-year timescales.
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Algeo, T. J., P. A. Meyers, R. S. Robinson, H. Rowe, and G. Q. Jiang. "Icehouse-greenhouse variations in marine denitrification." Biogeosciences Discussions 10, no. 9 (September 6, 2013): 14769–813. http://dx.doi.org/10.5194/bgd-10-14769-2013.

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Abstract. Long-term secular variation in the isotopic composition of seawater fixed nitrogen (N) is poorly known. Here, we document variation in the N-isotopic composition of marine sediments (δ15Nsed) since 660 Ma (million years ago) in order to understand major changes in the marine N cycle through time and their relationship to first-order climate variation. During the Phanerozoic, greenhouse climate modes were characterized by low δ15Nsed (∼ −2 to +2‰) and icehouse climate modes by high δ15Nsed (∼ +4 to +8‰). Shifts toward higher δ15Nsed occurred rapidly during the early stages of icehouse modes, prior to the development of major continental glaciation, suggesting a potentially important role for the marine N cycle in long-term climate change. Reservoir box modeling of the marine N cycle demonstrates that secular variation in δ15Nsed was likely due to changes in the dominant locus of denitrification, with a shift in favor of sedimentary denitrification during greenhouse modes owing to higher eustatic (global sea-level) elevations and greater on-shelf burial of organic matter, and a shift in favor of water-column denitrification during icehouse modes owing to lower eustatic elevations, enhanced organic carbon sinking fluxes, and expanded oceanic oxygen-minimum zones. The results of this study provide new insights into operation of the marine N cycle, its relationship to the global carbon cycle, and its potential role in modulating climate change at multimillion-year timescales.
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McKenzie, N. Ryan, and Hehe Jiang. "Earth's Outgassing and Climatic Transitions: The Slow Burn Towards Environmental “Catastrophes”?" Elements 15, no. 5 (October 1, 2019): 325–30. http://dx.doi.org/10.2138/gselements.15.5.325.

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On multimillion-year timescales, outgassing from the Earth's interior provides the principal source of CO2 to the ocean–atmosphere system, which plays a fundamental role in shaping the Earth's baseline climate. Fluctuations in global outgassing have been linked to icehouse–greenhouse transitions, although uncertainties surround paleo-outgassing fluxes. Here, we discuss how volcanic outgassing and the carbon cycle have evolved in concert with changes in plate tectonics and biotic evolution. We describe hypotheses of driving mechanisms for the Paleozoic icehouse–greenhouse climates and explore how climatic transitions may have influenced past biotic crises and, in particular, how variable outgassing rates established the backdrop for carbon cycle perturbations to instigate prominent mass extinction events.
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Steinhauff, D. Mark, Abduljaleel Abubshait, and Sam J. Purkis. "Red Sea Holocene carbonates: Windward platform margin and lagoon near Al-Wajh, northern Saudi Arabia." Journal of Sedimentary Research 91, no. 8 (August 19, 2021): 847–75. http://dx.doi.org/10.2110/jsr.2021.04.

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ABSTRACT Analysis of Holocene sedimentary seascape is focused on the Red Sea windward Al-Wajh platform margin, its central lagoon, and nearby isolated platforms based on data that include mapped ecological facies (habitats), water depths, grain sizes, and allochem types and abundances determined from thin sections. On this basis, a depositional model applicable to Red Sea Plio-Pleistocene and other ancient icehouse carbonate platforms is presented. The model highlights favorable reservoirs in analogous ancient systems to include coral crests and columnar framework habitats with primary porosity developed in boundstone lithologies and windward platform margins to contain considerable open pore space, including cavernous openings, of which not all should be anticipated to be occluded with marine cements and sediments. Meteoric diagenesis is expected to be minor as limited freshwater is available due to extreme aridity, but may play a role during glaciation. Most habitats have potential for secondary (enhanced) porosity resulting from dissolution of aragonite skeletons, particularly mollusk shells and calcareous coral (Scleractinia) endoskeletons. Central-lagoon habitats are expected to have the least favorable reservoir potential of environments considered because they are dominated by peloids. Central-lagoon sediment differs from other published localities, having higher peloid abundances, greater peloid distribution, and little or no association with Halimeda and quartz grains. Under the likely scenario that platform-interior sediments are completely bioturbated and comprise peloid-rich, grain-dominated fabrics, with many smaller peloids (most of them likely fecal pellets) at or near 4 μm in size (i.e., mud fraction), it is possible that grain size will control pore size once the considered deposits are lithified. If so, platform-interior sediments will lithify as mudstones, wackestones, or very fine-grained grainstones, an outcome which might otherwise be unexpected given the abundance of coarse peloid grains. The Al-Wajh platform is compared with 15 Holocene analogs and found to be unique with respect to rift-margin type, restricted-marine circulation, in having a lagoon with high peloid content, and lack of karst. In further comparison with ancient reservoir analogs, two greenhouse and four icehouse, it compares favorably to icehouse platforms deposited in rift basins with respect to mineralogy of deposition, meter-scale cycle thicknesses, and general peloid content and distribution. It provides a snapshot as to how an icehouse platform might have nucleated and attached along an active rift margin; it is a broadly applicable carbonate analog for the Red Sea Plio-Pleistocene and similar icehouse, rift basins.
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Kvale, Karin F., Katherine E. Turner, Angela Landolfi, and Katrin J. Meissner. "Phytoplankton calcifiers control nitrate cycling and the pace of transition in warming icehouse and cooling greenhouse climates." Biogeosciences 16, no. 5 (March 14, 2019): 1019–34. http://dx.doi.org/10.5194/bg-16-1019-2019.

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Abstract. Phytoplankton calcifiers contribute to global carbon cycling through their dual formation of calcium carbonate and particulate organic carbon (POC). The carbonate might provide an efficient export pathway for the associated POC to the deep ocean, reducing the particles' exposure to biological degradation in the upper ocean and increasing the particle settling rate. Previous work has suggested ballasting of POC by carbonate might increase in a warming climate, in spite of increasing carbonate dissolution rates, because calcifiers benefit from the widespread nutrient limitation arising from stratification. We compare the biogeochemical responses of three models containing (1) a single mixed phytoplankton class, (2) additional explicit small phytoplankton and calcifiers, and (3) additional explicit small phytoplankton and calcifiers with a prognostic carbonate ballast model, to two rapid changes in atmospheric CO2. The first CO2 scenario represents a rapid (151-year) transition from a stable icehouse climate (283.9 ppm) into a greenhouse climate (1263 ppm); the second represents a symmetric rapid transition from a stable greenhouse climate into an icehouse climate. We identify a slope change in the global net primary production response with a transition point at about 3.5 ∘C global mean sea surface temperature change in all models, driven by a combination of physical and biological changes. We also find that in both warming and cooling scenarios, the application of a prognostic carbonate ballast model moderates changes in carbon export production, suboxic volume, and nitrate sources and sinks, reducing the long-term model response to about one-third that of the calcifier model without ballast. Explicit small phytoplankton and calcifiers, and carbonate ballasting, increase the physical separation of nitrate sources and sinks through a combination of phytoplankton competition and lengthened remineralization profile, resulting in a significantly higher global nitrate inventory in this model compared to the single phytoplankton type model (15 % and 32 % higher for icehouse and greenhouse climates). Higher nitrate inventory alleviates nitrate limitation, increasing phytoplankton sensitivity to changes in physical limitation factors (light and temperature). This larger sensitivity to physical forcing produces stronger shifts in ocean phosphate storage between icehouse and greenhouse climates. The greenhouse climate is found to hold phosphate and nitrate deeper in the ocean, despite a shorter remineralization length scale than the icehouse climate, because of the longer residence times of the deep water masses. We conclude the global biogeochemical impact of calcifiers extends beyond their role in global carbon cycling, and that the ecological composition of the global ocean can affect how ocean biogeochemistry responds to climate forcing.
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Dissertations / Theses on the topic "Icehouse"

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van, Mourik Caroline A. "The Greenhouse - Icehouse Transition : a dinoflagellate perspective." Doctoral thesis, Stockholm University, Department of Geology and Geochemistry, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1073.

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Through the analysis of the stratigraphic and spatial distribution of organic walled dinoflagellate cysts (dinocysts) from climatologically and oceanographically key sites, this project aims to contribute to a better understanding of the Eocene-Oligocene (E/O) environmental changes and their timing. A central issue is to identify the global environmental changes which are responsible for the Eocene cooling and its underlying mechanisms with the focus on the Oligocene isotope-1 (Oi-1) event, thought to mark the onset of major Antarctic glaciation.

Two low-latitude sites were selected, Blake Nose (western North Atlantic) and Massignano (central Italy). For the first time a coherent taxonomy and biostratigraphy of dinocysts was established for the late Eocene at these latitudes. A high resolution correlation was established between the Massignano E/O Stratotype Section and the stratigraphically more extended ‘Massicore’. The composite section was used to analyse sea surface temperature (SST) change across the greenhouse-icehouse transition by means of dinocyst distribution.

At Massignano, the Oi-1 event was recognised both qualitatively and quantitatively. In the power spectrum of the SSTdino the ~100 and ~400 kyr eccentricity cycles may be distinguished and correlated with La04. When orbitally tuned, the E/O GSSP dates ~100 kyr older than the Oi-1 event. The boundary’s age could either be ~33.75 or ~34.1 Ma, both differ significantly from the ~33.9 Ma age in the GTS 2004.

Furthermore, when the data from the low-latitude sites were combined with extensive datasets from the Proto North Atlantic and adjacent regions, a suite of species sensitive to changes in SST was recognised. Their first and last occurrences reflect seven distinct phases of decreasing SSTs during the Middle Eocene to earliest Oligocene.

These results clearly indicate that atmospheric cooling together with higher frequency orbital forcing played a key role in the transition from the Greenhouse to the Icehouse world.

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Van, Mourik Caroline A. "The greenhouse - icehouse transition : a dinoflagellate perspective /." Stockholm : Department of Geology and Geochemistry, Stockholm University, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1073.

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Forsythe, G. T. W. "Construction and ecology of icehouse algal reefs." Thesis, University of Cambridge, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.599129.

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Tropical reefs, constructed during the late Palaeozoic icehouse climate, suffered high amplitude, high frequency sea level changes (Gondwanan glaciation). Rare three-dimensional outcrops of Virgilian (Pennsylvanian) and Wolfcampian (Early Permian) reefs occur in the Hueco Mountains, Texas. The reefs form part of a highly cyclical carbonate platform succession that suffered repeated emergence. The reefs are dominated by platy 'phylloid algae', these algae may belong to either Rhodophyta or Chlorophyta. The erect, recumbent or cyathiform genus Eugonophyllum is interpreted as belonging to the green algal family Halimedaceae. Eugonophyllum is the dominant reef building alga in the area studied. The prostrate phylloid alga Archaeolithophyllum is interpreted as belonging to the red algal family Corallinaceae. Archaeolithophyllum does not occur in the reefs, but forms extensive biostromes. The dominant constructional mechanism for reef formation has previously been regarded as sediment baffling and trapping, mainly by erect phylloid algae. Analysis of reef ecology clearly shows that these algae were in fact capable of forming a framework, to which considerable stability was added by secondary encrusting organisms such as the problematica Tubiphytes (or Shamovella) and Archaeolithoporella. Complex, multiple encrustations (both in-vivo and post-mortem) of these organisms were a fundamental element of reef construction. The effect of diagenesis on the phylloid algae and Tubiphytes are illustrated. Tubiphytes were found to be commonly altered on the ultrastructural scale, inferred to be by dissolution and reprecipitation, but with some preservation of microstructural features such as laminae.
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Paterson, Richard James. "Carbonate diagenesis and sedimentology in an icehouse world." Thesis, University of Bristol, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.492466.

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Early diagenesis of icehouse carbonate is complex, but can significantly modify depositional porosity and permeability. During icehouse times, high-amplitude highfrequency sea-level oscillations cause subaerial exposure, with vertical migration of meteoric hydrological-zones (vadose, fireshwater and mixing-zone) through the platform sediments. Repeated cycles of subaerial exposure and associated meteoric diagnesis result in significant porosity inversion, as carbonate grains are dissolved and re-precipitated as calcite cement. This diagenetic overprinting generates a complex pattern of cementation and secondary porosity and permeability, the distribution of which cannot be predicted simple through study of diagenetic products.
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Springate, Megan Elizabeth. "Keeping it cool, investigations around the Benares icehouse, Mississauga, Ontario." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq21703.pdf.

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Canile, Fernanda Maciel. "Evidências geológicas de mudanças climáticas (greenhouse-icehouse) na Antártica Ocidental durante a passagem Eoceno-Oligoceno." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/44/44141/tde-08012011-203025/.

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Durante o Eoceno e o Oligoceno (55 a 23 Ma) a Terra esteve sujeita a período de grandes mudanças climáticas. Registros geológicos, reforçados por modelos climáticos, indicam que o clima global durante esse período passou de estágio praticamente livre de calotas polares para situacao climática próxima a que hoje podemos encontrar na Antártica. Grande parte desses registros são indiretos, retirados de sedimentos de fundo marinho ou de material fóssil. Evidência terrestre clara da variação climática (greenhouse-icehouse) para o Eoceno-Oligoceno pode ser encontrada em Wesele Cove, ilha Rei Jorge, Antártica Ocidental. Tais evidências correspondem a uma sucessão de cerca de 60m com pelo menos 13 derrames de lava basáltica, de alguns metros de espessura cada, sobreposta, em contato erosivo, por diamictito e arenito. A sucessão basáltica é correlacionada com a Formação Mazurek Point/Hennequin, datada radiometricamente como do Eoceno, e o diamictito e arenito correspondem ao Membro Krakowiak Glacier da Formação Polonez Cove, datada, paleontológica e radiométricamente como pertencente ao Oligoceno inferior. Cada camada de basalto toleítico exibe uma zona inferior, mais espessa (1 a poucos metros), de rocha fresca, que é seguida transicionalmente por uma zona de alteração, variando de alguns decímetros a 1-1,5 m de espessura. O pacote de basalto está inclinado 25º para leste, provavelmente por tectonismo. A sucessão foi recentemente exposta devido ao rápido recuo da atual geleira Wyspianski. A evidência inicial de campo sugere que a sucessão representa um registro geológico de variação paleoclimática de condições mais amenas para condições glaciais, que pode ser correlacionada com a mudança do ótimo climático do final do Eoceno (greenhouse) para as condições de icehouse do Oligoceno, registradas na curva de paleotemperatura cenozóica estabelecida pela determinação de 18O em carapaças de foraminíferos. Este estudo teve como foco central a análise estratigráfica e geoquímica da ocorrência, a fim de interpretar a sucessão de eventos paleoclimáticos documentados no afloramento e analisá-los, no contexto da história paleoclimática da Antártica. Os dados obtidos mostraram que a transição de zonas não alteradas para alteradas observada em cada derrame de basalto pode de fato ser atribuídas à ação moderada de processos intempéricos no topo de cada derrame. Eles também demonstram uma origem glacial, em parte subglacial com contribuição marinha, dos diamictitos sobrepostos, que apresentam feições, tais como, clastos de litologias e tamanhos variados, facetados e estriados, clastos tipo bullet shaped, clastos partidos por congelamento, estrias intraformacionais e fósseis marinhos encontrados na matriz do diamictito. As condições climáticas amenas responsáveis pelo intemperismo do basalto durou até o surgimento do último horizonte de lava, seguida por movimentação tectônica que inclinou o pacote. Esses eventos indicam condições paleoclimáticas menos rigorosas relativamente longas durante o Eoceno, precedendo o estabelecimento do manto de gelo oligocênico nesta parte da Antártica.
During the Eocene and Oligocene (55 23 Ma) the Earth was undergoing a period of great climatic changes. Geological records, reinforced by climate models indicate that global climate during this period went from a stage in which the Earth was virtually free of polar ice caps to a stage close to what we find today in Antarctica. Most of these records are indirect, taken from the deep-sea cores or fossil material. Clear terrestrial evidence of climate change (greenhouse-icehouse) for the Eocene-Oligocene transition is found in Wesele Cove, King George Island, West Antarctica. This evidence includes a succession of at least thirteen, few meters thick, basaltic lava flows overlain disconformably by diamictite and sandstone. The basaltic section is correlated with the Mazurek Point/Hennequin Formation, radiometric dated as Eocene, and the diamictite and sandstone correspond to the Krakowiak Glacier Member of the Polonez Cove Formation, dated as Early Oligocene, on paleontological and radiometric basis. Each tholeiitic basalt layer exhibits a lower, thicker (1 to few meters) fresh zone, transitionally followed up by a zone of saprolith, varying from decimeters to 1-1.5 m in thickness. The entire basalt package of around 60 m, is tilted 25º to the east. The succession has been recently exposed due to fast retreat of the present Wyspianski Glacier. The initial field evidence suggests that the succession represents the geological record of paleoclimatic variation from mild to glacial conditions, that could correlate with the change from the late Eocene optimum climatic (greenhouse) to icehouse conditions in the Oligocene, as recorded on the Cenozoic paleotemperature curve established by 18O determinations on calcareous foram tests. This study had focus on the stratigraphy and geochemistry analysis of the occurrence, in order to interpret the succession of palaeoclimatic events documented in outcrop and analyze them in the context of paleoclimatic history of Antarctica. Data obtained consistently showed that the supposed transition from unaltered to altered zones observed in each basalt layer may in fact be assigned to the moderated action of weathering processes on top of each flow. They also demonstrate a glacial, in partly subglacial with marine contribution, origin for the overlying diamictites, which has features such clasts of diverse lithologies and sizes, faceted and striated clasts, bullet shaped clasts, clasts broken by freezing and thaw, intraformational striae and marine fossils found in the matrix of the diamictite. The mild paleoclimatic conditions responsible for weathering of the basalt lasted until the emplacement of the highest lava horizon, followed by tectonic movement that tilted the package. These events indicate a relatively long paleoclimatic mild conditions during the Eocene, preceding the establishment and displacement of the Oligocene ice-sheet in this part of Antarctica.
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Via, Rachael Kathleen. "Evolution of Atlantic deep-water circulation: from the greenhouse to the icehouse." Texas A&M University, 2005. http://hdl.handle.net/1969.1/2609.

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To better understand how the evolution of Cenozoic deep-water circulation related to changes in global climate and ocean basin configuration, we generated Nd isotope records from Ocean Drilling Program sites in the southeastern Atlantic to track deep water mass composition through time. We used fossil fish debris from ODP Sites 1262-1264 (Leg 208), spanning present-day water depths of 2500-4750 m, to reconstruct the isotopic signature of deep waters over the past ~53 Ma. The data indicate an initial transition from relatively non-radiogenic values (??Nd=~-10) at 53 Ma to more radiogenic values (~-8.5) at ~32 Ma. From ~32 Ma to 3.85 Ma, the Nd signal becomes more nonradiogenic, ~-12.3 at the top of the record. Comparison of our data with Nd isotopic records derived from a North Atlantic Fe-Mn crust show similar non-radiogenic values (~-10.5) in the 53??32 Ma interval and a trend toward more non-radiogenic values beginning at ~20 Ma. The data likely reflect an overall shift from a Southern Ocean deep water source to the ultimate incursion of deep waters from the North Atlantic. The non-radiogenic values at the base of the record reflect a Southern Ocean source of deep water. The shift toward more radiogenic values indicates an increased contribution of Pacific waters to the Southern Ocean source as the tectonic gateways changed after ~35-33 Ma. The subsequent trend toward more non-radiogenic Nd isotope values is approximately concurrent with the increase of benthic foraminiferal ??18O values, based on comparison with a compilation of global data. Thus, changes in oceanic gateway configuration in addition to overall cooling and the build-up of continental ice on Antarctica may have altered the Nd isotope character of Southern Ocean deep waters during the early Oligocene.
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Keech, Andrew R. "Chemical weathering in an icehouse world : the record from soils and lakes." Thesis, University of Bristol, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.556963.

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Chemical weathering of silicate rocks removes carbon dioxide from the atmosphere at a rate roughly proportional to its atmospheric abundance. This negative feedback mechanism is widely believed to have kept the Earth's climate within habitable bounds since life emerged several billion years ago. However, the presence of continental ice sheets (an 'icehouse' world, such as at the present day) may weaken the feedback mechanism or even change its sign. In order to test this hypothesis, samples were collected from two soil chronosequences in Scotland and Wyoming and from lake sediments in California. The behaviour of several radiogenic (strontium (Sr) and neodymium (Nd) and stable (molybdenum (Mo), copper (Cu) and zinc (Zn) isotope systems during weathering were then investigated. The composition of Sr released from silicate minerals in soils deposited since the last deglaciation (~20 ka) was observed to change from relatively radiogenic to relatively unradiogenic compositions with increasing soil age. This finding can, in part, explain the observed glacial-interglacial variability in Sr isotope composition of runoff from the Sierra Nevada over the past 150 ka as recorded in lake sediments. Such glacial-interglacial variation in the continental Sr flux to the oceans would alleviate existing problems with the marine Sr budget according to previous modelling and would support the hypothesis that the nature of feedback between climate (and atmospheric CO2 levels) and weathering changes as the Earth moves between greenhouse and icehouse conditions. Mo, Cu and Zn isotopes were shown to be fractionated by various biogeochemical processes in soils from Glen Feshie and the Wind River Mountains, Wyoming. The heavy isotopic composition of dissolved riverine Mo and Zn was shown to be related to incongruent weathering processes, perhaps related to soil age, whereas Cu appeared to weather congruently. Fractionation by vegetation and the role of organic matter within soils was also shown to be important in controlling the isotopic composition, concentration and distribution of Mo, Cu and Zn.
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Newsam, C. "Calcareous nannoplankton evolution and the Paleogene greenhouse to icehouse climate-mode transition." Thesis, University College London (University of London), 2017. http://discovery.ucl.ac.uk/1541282/.

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This thesis addresses calcareous nannoplankton evolutionary and palaeoecological response across the Paleogene greenhouse to icehouse transition using newly drilled material from Sites U1408 and U1411 (IODP Expedition 342) in the North Atlantic. Calcareous nannoplankton were the dominant oceanic phytoplankton group in the early Paleogene yet declined in diversity and underwent significant assemblage restructuring through the middle Eocene to early Oligocene, coinciding with major climatic reorganisation. However the structure and timing of this nannoplankton response is poorly constrained due to few records of appropriate stratigraphic resolution. Here, exceptionally preserved calcareous nannofossils from stratigraphically expanded packages of Paleogene clay-rich drift sediments from IODP Expedition 342 are used to document diversity loss and population shifts in order to interpret the relationship between plankton evolution and palaeoclimatic and palaeoceanographic change in the North Atlantic across this key interval, with focus on abrupt climatic change at the Middle Eocene Climatic Optimum (MECO) and the Eocene-Oligocene transition (EOT). Results indicate low speciation rates combined with relatively high extinction rates drove calcareous nannoplankton diversity loss through this interval and palaeoecological analysis highlights three key intervals; middle Eocene stability, incorporating muted assemblage response to transient warming at the MECO, the late Eocene transitional phase and the EOT and early Oligocene population restructuring, with major assemblage shifts controlled by intensified surface water cooling and increased nutrient availability. Palaeoclimatic and palaeoceanographic changes through this transition led to reduced optimal habitat space for this phytoplankton group resulting in decline and extinction in many taxa and the proliferation of select opportunists at the onset of the icehouse world.
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Tremblin, Maxime. "Contraindre la transition greenhouse-icehouse du Paléogène par la géochimie des coccolithes." Electronic Thesis or Diss., Sorbonne université, 2018. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2018SORUS450.pdf.

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Un obstacle majeur à la caractérisation des paléoclimats en période de type « greenhouse » tient à la mauvaise préservation des archives sédimentaires et à des limites dans les calibrations des marqueurs géochimiques utilisés. Ces limitations entrainent de grandes incertitudes sur les valeurs et la répartition des températures des eaux de surface (SSTs) et des concentrations en CO2 atmosphérique. Les mécanismes qui ont fait basculer le système Terre d’un régime de type greenhouse à icehouse au cours du Paléogène restent donc encore mal contraints. Dans cette thèse, l’évolution thermique de l'océan superficiel et les pCO2 atmosphériques au cours du Paléogène ont étés estimées à partir du signal isotopique (δ18O et ∆13C) des exosquelettes carbonatés des coccolithophoridés : les coccolithes. Les données montrent un refroidissement global des SSTs de l’Eocène inférieur à moyen. A l’Eocène supérieur et au travers de la transition Eocène-Oligocène, les pCO2 diminuent et le refroidissement des hautes latitudes se poursuit, induisant la mise en glace de l’Antarctique, tandis que la ceinture tropicale se réchauffe. Ce bouleversement dans la répartition des flux de chaleur à la surface de la Terre est synchrone de la mise en place d’un courant circumpolaire antarctique plus vigoureux. Ces résultats mettent donc en évidence le rôle moteur des changements de circulations océaniques dans la dynamique climatique de cette transition. De plus, cette thèse prouve également l’existence de gradients thermiques latitudinaux importants tout au long du Paléogène. L'hypothèse d'une répartition homogène des SSTs entre l’équateur et les pôles, si difficile à modéliser peut être écartée
Among the major obstacles in constraining paleoclimates for periods of “greenhouse” type is the poor preservation state of the sedimentary archive, and the existence of limits for each of the different applied geochemical markers. These obstacles lead to great uncertainties on the values and distribution of sea surface temperatures (SSTs) and atmospheric CO2 concentrations. Therefore, the mechanisms that brought the Earth’s system from a “greenhouse” to an “icehouse” regime throughout the Paleogene are not well constrained. In this thesis, we reconstructed the thermal evolution of the superficial ocean and the evolution of atmospheric pCO2 during the Paleogene from the isotopic signal (δ18O and ∆13C) of the fossilized carbonate exoskeleton of coccolithophores: coccoliths. Our data reveal a global cooling of surface waters from the Early to the Middle Eocene. During the Late Eocene and across the Eocene-Oligocene transition, values for pCO2 decrease, and cooling at high latitudes continues, allowing for the set up of an ice sheet in Antarctic, while the tropical belt warms. This change in the distribution of heat fluxes at the Earth’s surface during this period is synchronous to the deepening of the Drake Passage and to the set up of a vigorous Antarctic Circumpolar Current. These results thus highlight the driving role of changing oceanic circulations for climate dynamics during this transition. This thesis also proves the existence of important latitudinal thermal gradients throughout the Paleogene. The hypothesis of a homogeneous distribution of SSTs between the Equator and the poles, which prevails in the literature but remains hard to modelise, can thus be rejected
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Books on the topic "Icehouse"

1

Yolen, Jane. Welcome to the icehouse. New York: Putnam, 1998.

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1959-, Koeberl Christian, and Montanari Alessandro, eds. The late Eocene Earth: Hothouse, icehouse, and impacts. Boulder, Colo: Geological Society of America, 2009.

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name, No. From greenhouse to icehouse: The marine Eocene-Oligocene transition. New York: Columbia University Press, 2003.

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Buxbaum, Tim. Icehouses. Buckinghamshire: Shire, 1992.

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Icehouses. Buckinghamshire: Shire, 1992.

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Robberts, Léo. Les glacières à glace naturelle de Wallonie. [Soiron]: Qualité Village-Wallonie, 1989.

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1909-, Vermeulen J. G., and Wehdorn Manfred, eds. Eiskeller: Kulturgeschichte alter Kühltechniken. Wien: Böhlau, 1995.

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Le ghiacciaie: Architetture dimenticate. Firenze: Alinea, 2007.

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Lavigne-Louis, Maryannick. Glacières et caves à neige du Rhône. Lyon: Conseil général du Rhône, 2000.

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Ice houses of Iran: Where, how, why. Costa Mesa, California: Mazda Publishers, 2013.

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Book chapters on the topic "Icehouse"

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Warny, Sophie, and Rosemary Askin. "Last Remnants of Cenozoic Vegetation and Organic-Walled Phytoplankton in the Antarctic Peninsula's Icehouse World." In Tectonic, Climatic, and Cryospheric Evolution of the Antarctic Peninsula, 167–92. Washington, D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/2010sp000996.

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Gastaldo, Robert A., Marion Bamford, John Calder, William A. DiMichele, Roberto Iannuzzi, André Jasper, Hans Kerp, et al. "The Non-analog Vegetation of the Late Paleozoic Icehouse–Hothouse and Their Coal-Forming Forested Environments." In Springer Textbooks in Earth Sciences, Geography and Environment, 291–316. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-35058-1_12.

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Buijs, GOvert J. A., and Robert H. Goldstein. "Sequence Architecture and Palaeoclimate Controls on Diagenesis Related to Subaerial Exposure of Icehouse Cyclic Pennsylvanian and Permian Carbonates." In Linking Diagenesis to Sequence Stratigraphy, 55–79. West Sussex, UK: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118485347.ch3.

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"Icehouse." In Encyclopedic Dictionary of Archaeology, 627. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-58292-0_90014.

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Tyrrell, Toby. "Icehouse Earth." In On Gaia. Princeton University Press, 2013. http://dx.doi.org/10.23943/princeton/9780691121581.003.0005.

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This chapter compares the life that evolution produced during the past cold and warm climates of long duration. The dominant climatic state of the last several million years has been ice ages. James Lovelock has argued that these are a more favorable state for life on Earth than the present interglacials. This does not, however, sit well with various observations. During ice ages: (i) there was less land free of ice; (ii) much of the most productive parts of the ocean, the shelf seas, were turned into dry land by lower sea level; and (iii) the total mass of carbon locked up in vegetation and soils was only about half as much as today. Not only were ice ages unfortunate episodes for life on Earth, but also, conversely, the Earth during the Cretaceous was possibly even more congenial than it is today, although the evidence is not conclusive on this point.
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Summerhayes, Colin. "Icehouse Climates." In The Icy Planet, 28—C2P157. Oxford University PressNew York, 2023. http://dx.doi.org/10.1093/oso/9780197627983.003.0002.

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Abstract Over the past 1,000 million years, Earth’s climate oscillated between warm greenhouse climates (abundant CO2), when sea level was high, and cold icehouse climates (low CO2), when sea level was low and large ice sheets were common. At times between 1,000 and 500 million years ago Earth was a “snowball” covered in ice from poles to tropics. Icehouse climates with polar ice developed around 445 million years ago, 300 million years ago, and over the past 34 million years (when the Antarctic ice sheet formed). Northern hemisphere ice sheets developed over the past 2.6 million years, when climates oscillated from warm to cold in Milankovitch Cycles. Human civilization developed in a warm Milankovitch Cycle peaking about 12,000 years ago. Plate tectonics drove rises in CO2 when volcanism was abundant. Chemical weathering of mountains drove falls in CO2. As trees evolved, they also sucked CO2 out of the air.
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"5. Icehouse Earth." In On Gaia, 88–112. Princeton: Princeton University Press, 2013. http://dx.doi.org/10.1515/9781400847914-006.

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"Into the Icehouse." In Earth's Climate Evolution, 105–31. Chichester, UK: John Wiley & Sons, Ltd, 2015. http://dx.doi.org/10.1002/9781118897362.ch7.

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Zalasiewicz, Jan, and Mark Williams. "Into the Icehouse." In The Goldilocks Planet. Oxford University Press, 2012. http://dx.doi.org/10.1093/oso/9780199593576.003.0013.

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The frozen lands of the north are an unforgiving place for humans to live. The Inuit view of the cosmos is that it is ruled by no one, with no gods to create wind and sun and ice, or to provide punishment or forgiveness, or to act as Earth Mother or Father. Amid those harsh landscapes, belief is superfluous, and only fear can be relied on as a guide. How could such a world begin, and end? In Nordic mythology, in ancient times there used to be a yet greater kingdom of ice, ruled by the ice giant, Ymir Aurgelmir. To make a world fit for humans, Ymir was killed by three brothers—Odin, Vilje, and Ve. The blood of the dying giant drowned his own children, and formed the seas, while the body of the dead giant became the land. To keep out other ice giants that yet lived in the far north, Odin and his brothers made a wall out of Ymir’s eyebrows. One may see, fancifully, those eyebrows still, in the form of the massive, curved lines of morainic hills that run across Sweden and Finland. We now have a popular image of Ymir’s domain—the past ‘Ice Age’—as snowy landscapes of a recent past, populated by mammoths and woolly rhinos and fur-clad humans (who would have been beginning to create such legends to explain the precarious world on which they lived). This image, as we have seen, represents a peculiarly northern perspective. The current ice age is geologically ancient, for the bulk of the world’s land-ice had already grown to cover almost all Antarctica, more than thirty million years ago. Nevertheless, a mere two and a half million years ago, there was a significant transition in Earth history—an intensification of the Earth’s icehouse state that spread more or less permanent ice widely across the northern polar regions of the world. This intensification— via those fiendishly complex teleconnections that characterize the Earth system—changed the face of the entire globe. The changes can be detected in the sedimentary strata that were then being deposited around the world.
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"LOCKED IN THE ICEHOUSE." In All Things, Seen and Unseen, 91–93. University of Arkansas Press, 1997. http://dx.doi.org/10.2307/j.ctv1w0xcm5.41.

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Conference papers on the topic "Icehouse"

1

Hearty, Paul J., and Blair R. Tormey. ""ICEHOUSE, GREENHOUSE, MADHOUSE” – HAVE WE ARRIVED?" In Joint 69th Annual Southeastern / 55th Annual Northeastern GSA Section Meeting - 2020. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020se-344766.

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Yodjaiphet, Anusorn, and Wiwat Tippachon. "The design of IoT system for icehouse manufacturing." In 2018 5th International Conference on Business and Industrial Research (ICBIR). IEEE, 2018. http://dx.doi.org/10.1109/icbir.2018.8391157.

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Khameiss, Belkasim, Richard Fluegeman, Ahmed Muftah, William H. Hoyt, Shawn J. Malone, Jeffry D. Grigsby, Randall Bernot, Tykhon Zubkuf, and Saad K. El Ebaidi. "CORAL-ALGAL COMPETITION ON TERTIARY REEFS: GREENHOUSE TO ICEHOUSE TRANSITIONS." In Joint 53rd Annual South-Central/53rd North-Central/71st Rocky Mtn GSA Section Meeting - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019sc-326622.

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Sardar Abadi, Mehrdad, Gerilyn S. Soreghan, Jeremy D. Owens, Xiaolei Liu, and Theodore R. Them. "ATMOSPHERIC DUST STIMULATED MARINE PRIMARY PRODUCTIVITY DURING EARTH’S PENULTIMATE ICEHOUSE." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-320538.

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Wade, Bridget S., Abigail Betts, Zara Hickling, Joseph Thorogood, and Paul Upchurch. "WAXING AND WANING OF PLANKTONIC FORAMINIFERAL DIVERSITY IN THE OLIGOCENE ICEHOUSE." In GSA 2020 Connects Online. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020am-357086.

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Dupont-Nivet, Guillaume, Niels Meijer, Mustafa Kaya, Delphine Tardif, Lin Li, Alexis Licht, Natasha Barbolini, et al. "MONSOONS VS. WESTERLIES DURING TIBETAN PLATEAU GROWTH AND GREENHOUSE-ICEHOUSE TRANSITION." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-338825.

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Griffis, Neil, Roland Mundil, Isabel Montanez, Jon D. Richey, Pierre Dietrich, Daniel Le Heron, Christoph Kettler, Bastien Linol, and Roberto Iannuzzi. "TIMING AND POTENTIAL CAUSES FOR THE DEMISE OF EARTH’S PENULTIMATE ICEHOUSE." In GSA Connects 2021 in Portland, Oregon. Geological Society of America, 2021. http://dx.doi.org/10.1130/abs/2021am-367955.

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Conwell, Christopher, Cole Edwards, Elizabeth M. Griffith, and Matthew R. Saltzman. "GLOBAL COOLING LINKED TO BASALTIC WEATHERING DURING THE ORDOVICIAN GREENHOUSE–ICEHOUSE TRANSITION." In GSA 2020 Connects Online. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020am-357955.

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Bentley, Olivia L., Peter A. Allison, Alexandros Avdis, and Matthew D. Piggott. "THE ROLE OF BATHYMETRY IN UPWELLING INDUCED PRODUCTIVITY IN ICEHOUSE AND GREENHOUSE WORLDS." In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-284659.

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Miller, Kenneth G., James V. Browning, and James D. Wright. "SEA-LEVEL CHANGES DURING CRETACEOUS TO CENOZOIC HOTHOUSE, COOL GREENHOUSE AND ICEHOUSE WORLDS." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-320321.

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