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Journal articles on the topic 'Eocene'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Айрапетян, Ф. А. "ЗОНАЛЬНОЕ ДЕЛЕНИЕ ЭОЦЕНОВЫХ ОТЛОЖЕНИЙ ПО МЕЛКИМ ФОРАМИНИФЕРАМ ПО МАТЕРИАЛАМ ИЗ СКВАЖИНЫ «ЛАНДЖАР-2»". Proceedings of the YSU C: Geological and Geographical Sciences 43, № 2 (219) (2009): 28–36. http://dx.doi.org/10.46991/pysu:c/2009.43.2.028.

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The present study is focused on the zonal distribution of Eocene deposits from the borehole materials of «Langjar 2» (South-East Armenia). Studying the area and analyzing 35 plankton Foraminifera species several zones have been revealed. Morozovella aragonesis and Acarinina pentacamerata (Lower Eocene), Acarinina bullbrooki, Ac. rotundimarginata, Hantkenina alabamensis, Orb. beckmanii and Truncorotaloides rohri (Middle Eocene), Globigerapsis semiinvoluta and Globorotalia cocoaensis (Upper Eocene). By benthonic Foraminifera the following zones have been revealed: Heterolepa eocaena, Uvigerina c

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Hou, Lianhai, and Per G. P. Ericson. "A Middle Eocene Shorebird from China." Condor 104, no. 4 (2002): 896–99. http://dx.doi.org/10.1093/condor/104.4.896.

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Abstract We describe a new species of shorebird, tentatively referred to the family Charadriidae, from the Huadian Formation (Middle Eocene) in Jilin Province, China. In general morphology the specimen closely matches that of an extant charadriid, and corresponds in size to the Killdeer (Charadrius vociferus). If correctly identified this is the oldest record of the Charadriidae. The Middle Eocene paleoenvironment of the Huadian region is thought to have resembled a subtropical swamp. Un Ave Playera de China del Eoceno Medio Resumen. Describimos una nueva especie de ave playera, tentativamente

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Trubin, Y. S. "Family Naticidae of the Tavda formation (Eocene, Western Siberia)." Ruthenica, Russian Malacological Journal 28, no. 1 (2018): 11–17. http://dx.doi.org/10.35885/10.35885/ruthenica.2018.28(1).2.

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The present work is one of several planned articles on updating information on the biodiversity of malacofauna and palaeogeography of the Middle-Late Eocen Tavda Sea, which existed in the Western Siberia. Paper contains data on fossil species diversity of the family Naticidae of the Middle and Late Eocene West Siberian Sea and on drill holes. The drill holes indicate predator activity, prey of Naticidae and influence of abiotic factors on their behavior. Previously the invertebrate macroauna of the Eocene of Western Siberia was not studied. As a result, the biodiversity, paleogeography and pal

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Strougo, Amin. "The Middle Eocene/Upper Eocene transition in Egypt reconsidered." Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 186, no. 1-2 (1992): 71–89. http://dx.doi.org/10.1127/njgpa/186/1992/71.

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5

Lygina, E. A., N. V. Pravikova, E. R. Chizhova, et al. "Eocene seismicity and paleogeography of the Central Crimea." Moscow University Bulletin. Series 4. Geology, no. 5 (December 17, 2022): 68–77. http://dx.doi.org/10.33623/0579-9406-2022-5-68-77.

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The article considers the results of a comprehensive study of the Cretaceous-Eocene deposits of the Central Crimea (Ak-Kaya mount.). The temperature and salinity of the formation of Maastrichtian and Eocene rocks have been determined, and a correlation has been made with the global climatic event EЕСO (Early Eocene Climate Optimum). The synchronicity of the formation of steep submeridional fractures and the basal horizon of the Eocene has been proved. Three major stages of deformation have been identified: pre-Eocene, Eocene, and post-Eocene. It is shown that the Eocene stage corresponds to th

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Averianov, Alexander O. "Paleogene Sea Snakes from the Eastern Part of Tethys." Russian Journal of Herpetology 4, no. 2 (2011): 128–42. http://dx.doi.org/10.30906/1026-2296-1997-4-2-128-142.

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Nessovophis tamdy gen. et sp. nov. (Nigerophiidae, middle Eocene, Bartonian), Nessovophis zhylga sp. nov. (early Eocene, Ypresian), Palaeophis ferganicus sp. nov. (early Eocene, Ypresian), Palaeophis udovichenkoi sp. nov. (middle – ?late Eocene, Bartonian – ?Priabonian), Palaeophis nessovi sp. nov. (late Eocene, Priabonian), Palaeophis sp. (middle Eocene, Bartonian), and Pterosphenus muruntau sp. nov. (middle Eocene, Bartonian) are described and Vialovophis zhylan Nessov, 1984 (?latest Paleocene) is redescribed on the basis of 45 isolated vertebrae from 8 localities in Kazakhstan, Tajikistan,

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Liliegraven, J. A. "Eocene Revelations." Science 264, no. 5161 (1994): 1004–5. http://dx.doi.org/10.1126/science.264.5161.1004.

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8

Huber, Matthew, and Aaron Goldner. "Eocene monsoons." Journal of Asian Earth Sciences 44 (January 2012): 3–23. http://dx.doi.org/10.1016/j.jseaes.2011.09.014.

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9

Browning, James V., Kenneth G. Miller, W. John Schmelz, and Peter J. Sugarman. "Eocene sequences and forward modeling of the New Jersey coastal plain, U.S.A.: changing depositional styles in response to climate and sea level." Journal of Sedimentary Research 95, no. 2 (2025): 383–404. https://doi.org/10.2110/jsr.2024.069.

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ABSTRACT We map the spatial and temporal distribution and depositional environments of Eocene sequences and formations in the New Jersey Coastal Plain, USA, using an array of coreholes and gamma logs. On this passive margin, Eocene depositional systems reflect a change from prograding earliest Eocene mud lobes, to early to middle Eocene hemipelagic ramp, and finally to late middle Eocene prograding sandy sequences. The Marlboro Clay, containing the Paleocene–Eocene Thermal Maximum (PETM), was deposited as prograding fluid mud during times of high global temperatures; it is found in northern an

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Aubry, Marie-Pierre, and Rehab Salem. "The Dababiya Quarry Core: Coccolith biostratigraphy." Stratigraphy 9, no. 3-4 (2012): 241–59. http://dx.doi.org/10.29041/strat.09.3.08.

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We establish the coccolith stratigraphy of the Maastrichtian through lower Eocene section recovered from the Dababiya Core taken ~200 m from the GSSP for the Paleocene/Eocene boundary, and correlate coccolith biozones with lithostratigraphic units in the core. The section extends from Maestrichtian Subzone CC25a to lowermost Eocene Subzone NP9c. The composite Paleocene-lower Eocene Dababiya section recovered in the core and accessible in outcrop in the DababiyaQuarry exhibits an unexpected contrast in thickness between the Lower Eocene succession (~Esna Shales) and the Paleocene one (~Dakhla S

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Avendaño, Gladys Marcela, Luis Felipe Cruz, Luis Enrique Cruz, and Mario Garcia. "Thermal evolution of Los Cuervos formation in the southern area of the Cesar sub-basin (Colombia), based on geochemical and petrophysical data." Earth Sciences Research Journal 25, no. 2 (2021): 179–92. http://dx.doi.org/10.15446/esrj.v25n2.86025.

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The tectonic complexity to which the post-Cretaceous Cesar-Ranchería basin has been subjected has generated alterations in the evolution of its oil system, evidence of this is the lack of stratigraphic record in the Cesar sub-basin belonging to ages ranging from the Eocene to the Early Miocene. These units that are no longer present could have been deposited and eroded during this period of time, leaving their mark on the closest overlying units. Previously mentioned hypothesis oriented this research to study how the basin filling was in the time range from the Eocene to the early Miocene base

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Tribe, Selina. "Eocene paleo-physiography and drainage directions, southern Interior Plateau, British Columbia." Canadian Journal of Earth Sciences 42, no. 2 (2005): 215–30. http://dx.doi.org/10.1139/e04-062.

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A map of reconstructed Eocene physiography and drainage directions is presented for the southern Interior Plateau region, British Columbia south of 53°N. Eocene landforms are inferred from the distribution and depositional paleoenvironment of Eocene rocks and from crosscutting relationships between regional-scale geomorphology and bedrock geology of known age. Eocene drainage directions are inferred from physiography, relief, and base level elevations of the sub-Eocene unconformity and the documented distribution, provenance, and paleocurrents of early Cenozoic fluvial sediments. The Eocene la

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Squires, Richard L. "Cephalopods from the late Eocene Hoko River Formation, northwestern Washington." Journal of Paleontology 62, no. 01 (1988): 76–82. http://dx.doi.org/10.1017/s002233600005890x.

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Rare specimens of the nautiloidsNautilusandAturiaand extremely rare specimens of a sepiamorph sepiid are described from the late Eocene Hoko River Formation, northern Olympic Peninsula, Washington. The well-preserved partial phragmocones are from channel-fill clastics deposited on the inner and middle slopes of a submarine-fan system.TheNautilusspecimen is allied toN. cookanumWhitfield from middle Eocene strata, New Jersey, and is probably conspecific withNautilussp. (Miller) from late Eocene strata, northwestern Oregon, both of which were previously assigned toEutrephoceras.This is the first

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Squires, Richard L. "Cephalopods from the late Eocene Hoko River Formation, northwestern Washington." Journal of Paleontology 62, no. 1 (1988): 76–82. http://dx.doi.org/10.1017/s0022336000018023.

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Rare specimens of the nautiloidsNautilusandAturiaand extremely rare specimens of a sepiamorph sepiid are described from the late Eocene Hoko River Formation, northern Olympic Peninsula, Washington. The well-preserved partial phragmocones are from channel-fill clastics deposited on the inner and middle slopes of a submarine-fan system.TheNautilusspecimen is allied toN. cookanumWhitfield from middle Eocene strata, New Jersey, and is probably conspecific withNautilussp. (Miller) from late Eocene strata, northwestern Oregon, both of which were previously assigned toEutrephoceras.This is the first

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Port, U., M. Claussen, and V. Brovkin. "Radiative forcing by forest and subsequent feedbacks in the early Eocene climate." Climate of the Past Discussions 11, no. 2 (2015): 997–1029. http://dx.doi.org/10.5194/cpd-11-997-2015.

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Abstract. Using the Max Planck Institute for Meteorology Earth System Model, we investigate the forcing of forests and the feedback triggered by forests in the pre-industrial climate and in the early Eocene climate (about 54 to 52 million years ago). Other than the interglacial, pre-industrial climate, the early Eocene climate was characterised by high temperatures which led to almost ice-free poles. We compare simulations in which all continents are covered either by dense forest or by bare soil. To isolate the effect of soil albedo, we choose either bright soils or dark soils, respectively.

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Elbertsen, Mark V., Erik van Sebille, and Peter K. Bijl. "Possible provenance of IRD by tracing late Eocene Antarctic iceberg melting using a high-resolution ocean model." Climate of the Past 21, no. 2 (2025): 441–64. https://doi.org/10.5194/cp-21-441-2025.

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Abstract. The Eocene–Oligocene transition (EOT) is characterised by the inception of the large-scale Antarctic ice sheet. However, evidence of earlier glaciation during the Eocene has been found, including the presence of ice-rafted debris (IRD) at Ocean Drilling Program (ODP) Leg 113 Site 696 on the South Orkney Microcontinent (SOM) (Carter et al., 2017). This suggests marine-terminating glaciers should have been present in the southern Weddell Sea region during the late Eocene, generating sufficiently large icebergs to the South Orkney Microcontinent to survive the high Eocene ocean temperat

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Aladžova-Khrischeva, Kina, Lili Nedjalkova, and Tzanko Tzankov. "Lithostratigraphy and deformations in the Palaeogene sediments from the western and middle parts of the Forebalkan and Stara-Pianina range mountains." Geologica Balcanica 21, no. 6 (1991): 49–90. http://dx.doi.org/10.52321/geolbalc.21.6.49.

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The following lithostratigraphic units are introduced: the Iztočnik Formation with the Beljane Member (Lower Eocene), the Pavolče Forfnation (Lower Eocene), the Bojnica Formation (Lower Eocene), the Lukovit Formation with the Âglen Member (Lower and Middle Eocene), the Staropatica Formation (Lower and Middle Eocene) and the Ugârčin Formation (Middle Eocene). The uppermost parts of the Kajlaka Formation have probably an Early Palaeocene Age. All the Palaeogene lithologic bodies represent relics of the sediments in the South Margin of the Late Maastrichtian – Early Palaeocene marine basin, of th

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Pigg, Kathleen B., Steven R. Manchester, and Melanie L. Devore. "The early Eocene flora of Horsefly, British Columbia, Canada and its phytogeographic significance." Fossil Imprint 79, no. 2 (2023): 126–43. http://dx.doi.org/10.37520/fi.2023.007.

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About forty species, including a bryophyte, ferns, conifers, Ginkgo, and over 35 angiosperms, are recognized based on compression-impression remains from the early Eocene of Horsefly, British Colombia, Canada. This flora is in the north central part of a chain of late early Eocene fossil assemblages known as floras of the “Okanagan Highlands” (= “Okanogan Highlands” in the US). These floras extend from north central British Columbia, Canada southeast to Republic, Washington, USA. The Horsefly flora shows similarities to other Eocene Okanagan Highlands floras, such as McAbee, Falkland, Thomas R

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Molina, Eustoquio, Concepción Gonzalvo, and Gerta Keller. "The Eocene-Oligocene planktic foraminiferal transition: extinctions, impacts and hiatuses." Geological Magazine 130, no. 4 (1993): 483–99. http://dx.doi.org/10.1017/s0016756800020550.

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AbstractBiostratigraphic study and re-examination of 22 late Eocene to early Oligocene sections provides data in support of three and possibly a fourth late Eocene impact events in the G. index Zone during a period of about 1 Ma of the middle Priabonian between 34.7 and 35.7 Ma. No major species extinctions or significant species abundance changes directly coincide with these impact events. Species extinctions are gradual and selective, affecting primarily cool-temperature-intolerant surface dwellers. These extinctions began with the onset of global cooling during the early middle Eocene and c

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Shamrock, Jamie L., and David K. Watkins. "Eocene calcareous nannofossil biostratigraphy and community structure from Exmouth Plateau, Eastern Indian Ocean (ODPSite 762)." Stratigraphy 9, no. 1 (2012): 1–54. http://dx.doi.org/10.29041/strat.09.1.01.

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A relatively complete section of Eocene (∼33.9-55.8 Ma) pelagic chalk from offshore northwestern Australia was used to analyze range and abundance data of ∼250 Eocene species to test the efficacy of the existing CP (Okada and Bukry 1980) and NP (Martini 1971) biostratigraphic zonation schemes. Changes in nannofossil diversity, abundance, and community structure were monitored through several Eocene paleoenvironmental events, as identified by changes in δ 13C and δ 18O data, to examine variations in surface water conditions. Major changes in nannofossil assemblages, as indicated by dominance cr

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Banerjee, Amit, and George E. Boyajian. "Selectivity of foraminiferal extinction in the late Eocene." Paleobiology 23, no. 3 (1997): 347–57. http://dx.doi.org/10.1017/s0094837300019722.

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Late Eocene foraminiferal extinction shows diverse patterns of selective morphologic and latitudinal extinction. Taxa with discoidal shape, calcareous tests, and narrow and low-latitudinal ranges are at significantly greater risk of extinction. Elevated extinction intensities in calcareous tests are mainly due to the presence of larger benthic foraminifera that evolved in late Paleocene and diversified through the lower to middle Eocene. Selectivity of late Eocene foraminiferal extinction indicates that this extinction event was not a globally uniform event. Although this result does not verif

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West, Christopher K., David R. Greenwood, Tammo Reichgelt, Alexander J. Lowe, Janelle M. Vachon, and James F. Basinger. "Paleobotanical proxies for early Eocene climates and ecosystems in northern North America from middle to high latitudes." Climate of the Past 16, no. 4 (2020): 1387–410. http://dx.doi.org/10.5194/cp-16-1387-2020.

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Abstract. Early Eocene climates were globally warm, with ice-free conditions at both poles. Early Eocene polar landmasses supported extensive forest ecosystems of a primarily temperate biota but also with abundant thermophilic elements, such as crocodilians, and mesothermic taxodioid conifers and angiosperms. The globally warm early Eocene was punctuated by geologically brief hyperthermals such as the Paleocene–Eocene Thermal Maximum (PETM), culminating in the Early Eocene Climatic Optimum (EECO), during which the range of thermophilic plants such as palms extended into the Arctic. Climate mod

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Tierney, Jessica E., Jaap S. Sinninghe Damsté, Richard D. Pancost, Appy Sluijs, and James C. Zachos. "Eocene temperature gradients." Nature Geoscience 10, no. 8 (2017): 538–39. http://dx.doi.org/10.1038/ngeo2997.

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Dilcher, David. "Eocene lake messel." Geochimica et Cosmochimica Acta 54, no. 10 (1990): 2901–2. http://dx.doi.org/10.1016/0016-7037(90)90033-h.

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25

Kessler, Franz L., John Jong, and Mazlan Madon. "Sedimentary Record of Paleogene Sequences in the Penyu and Malay Basins, Offshore Peninsular Malaysia." Berita Sedimentologi 46, no. 1 (2021): 6–20. http://dx.doi.org/10.51835/bsed.2020.46.1.57.

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The Eocene to Lower Oligocene deposits of the Penyu and Malay basins are formed by fluvial-lacustrine deposits with marine influence in the latter. The sequence consists mainly of siltstone, with several intercalations of fine-grained sand and volcanic tuff. Based on well data, Mid-Upper Eocene sediments exist in Penyu Basin in the deeper parts of the half grabens and sub-basins. Hence, this implies the age of basin initiation at Mid-Eocene, rather than Oligocene as traditionally and commonly stated in the literature. By correlation, and as seismic evidences show, Eocene sediments also appear

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Mandal, J., and Madhav Kumar. "Distribution of palynofossils across the Palaeocene-Eocene Boundary in north-east and western India." Journal of Palaeosciences 46, no. (1-2) (1997): 171–76. http://dx.doi.org/10.54991/jop.1997.1336.

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Late Palaeocene-Early Eocene palynoassemblages of north-east and western India have been analysed to assess the behaviour of palynotaxa during the transition. More than 50 per cent of the taxa continue from Palaeocene to Eocene while some are restricted only to Palaeocene. A number of palynotaxa appear in the Early Eocene that may be considered markers. A critical study on the distribution pattern of these palynotaxa indicates that there is no sharp or abrupt change during Palaeocene-Eocene instead the majority of taxa are common and differ only in percentage frequency.

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Kalia, Prabha, and Amit Banerjee. "Pellatispira-Bearing Upper Eocene Subcrops in Tanot-I Well, Northwest of Jaisalmer, Rajasthan and their Significance." Journal Geological Society of India 38, no. 1 (1991): 76–81. http://dx.doi.org/10.17491/jgsi/1991/380109.

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Abstract Late Eocene strata bearing Pellatispira crassicolumnata, Silvestriella tetrahedra, Nummulites fabianii, Nummulites striatus and Asterocyclina stellata have been identified in the subsurface samples from Tanot-I well 145 km northwest of Jaisalmer Earlier in the Rajasthan region, the sea was considered to have finally withdrawn by the Late-Middle Eocene. The present record of strata of Late Eocene age supports the hypothesis of oceanic subduction followed by obduction of the Indus Basin. The presence of Late Eocene in Kirthar and Sulaiman Ranges, Pakistan, and Jaisalmer, India and their

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Goedert, James L. "Giant late Eocene marine birds (Pelecaniformes: Pelagornithidae) from northwestern Oregon." Journal of Paleontology 63, no. 6 (1989): 939–44. http://dx.doi.org/10.1017/s0022336000036647.

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Fossil bird bones from the late Eocene Keasey Formation and the latest Eocene Pittsburg Bluff Formation in northwestern Oregon are the earliest records of the pelecaniform family Pelagornithidae for the Pacific Basin. These fossils also represent the first late Eocene records of the family from the Northern Hemisphere, the second late Eocene record worldwide, and indicate that these animals were among the largest of flying birds. Unfortunately, the fragmentary condition of these fossils and the currently confused state of pelagornithid systematics prevents the assignment of these specimens to

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Port, U., M. Claussen, and V. Brovkin. "Radiative forcing and feedback by forests in warm climates – a sensitivity study." Earth System Dynamics Discussions 6, no. 2 (2015): 2577–615. http://dx.doi.org/10.5194/esdd-6-2577-2015.

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Abstract. The biogeophysical effect of forests in a climate with permanent high-latitude ice cover has already been investigated. We extend this analysis to warm, basically ice-free climates, and we choose the early Eocene, some 54 to 52 million years ago, as paradigm for such type of climate. We use the Max Planck Institute for Meteorology Earth System Model to evaluate the radiative forcing of forests and the feedbacks triggered by forests in early Eocene and pre-industrial climate, respectively. To isolate first-order effects, we compare idealised simulations in which all continents are cov

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MAKARKIN, VLADIMIR N., GWEN S. ANTELL, and S. BRUCE ARCHIBALD. "A revision of Chrysopidae (Neuroptera) from the late Eocene Florissant Formation, Colorado, with description of new species." Zootaxa 5133, no. 3 (2022): 301–45. http://dx.doi.org/10.11646/zootaxa.5133.3.1.

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The green lacewings (Neuroptera: Chrysopidae) of the late Eocene Florissant Formation (Colorado, USA) are revised. Thirteen species in six genera of Nothochrysinae are recognized, including four new species: Archaeochrysa cockerelli sp. nov., Cimbrochrysa americana sp. nov., C. major sp. nov., and Lithochrysa meyeri sp. nov. The validity of the genus Dyspetochrysa Adams, 1967 is tenuous; it might be a synonym of Archaeochrysa Adams, 1967. Lithochrysa Carpenter, 1935 and L. ferruginea (Cockerell, 1909) are considered a valid genus and species. A lectotype and paralectotype of Tribochrysa firmat

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Hernitz Kučenjak, Morana, Vlasta Premec Fućek, Renata Slavković, and Ivan Mesić. "Planktonic Foraminiferal Biostratigraphy of the Late Eocene and Oligocene in the Palmyride Area, Syria." Geologia Croatica 59, no. 1 (2006): 19–39. http://dx.doi.org/10.4154/gc.2006.02.

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Three deep exploration wells in the Palmyride area (Syria) have beendrilled through Oligocene and Eocene deposits. A detailed micropalaeontological investigation has been performed on the planktonic foraminiferal assemblage from drill cuttings. Standard planktonic foraminiferal zones from P15 to P22 (E15 to O6) have been identified.The test morphology and diversity of the foraminiferal assemblageindicate a general cooling trend during the late Eocene andOligocene. The specialized Eocene forms (K-mode life strategy) suchas turborotaliids, globigerinathekids and hantkeninids become extinctin the

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Abd El-Aziz, Sayed M., Ibrahim M. Abd El-Gaied, Mansour H. Al-Hashim, et al. "First Report of Middle Eocene Micromorphic Brachiopods from Northeastern Libya: Taxonomy and Paleobiogeography Implications." Diversity 16, no. 11 (2024): 672. http://dx.doi.org/10.3390/d16110672.

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Two brachiopod species, Terebratulina tenuistriata (Leymerie, 1846) and Orthothyris pectinoides (von Koenen, 1984), have been recorded for the first time from the Middle Eocene (Late Lutetian) nummulitic limestone beds in the Darnah Formation at the Wadi Darnah area in Northeast Libya. These brachiopod species are associated here with Nummulites discorbinus (Schlotheim), Nummulites praelyelli (Boukhary and Kamal), and Nummulites bullatus (Schaub) and are widely distributed on this Middle Eocene Nummulites carbonate platform. The two recorded species are common in the Eocene rocks of Europe and

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Baatsen, Michiel, Anna S. von der Heydt, Matthew Huber, et al. "The middle to late Eocene greenhouse climate modelled using the CESM 1.0.5." Climate of the Past 16, no. 6 (2020): 2573–97. http://dx.doi.org/10.5194/cp-16-2573-2020.

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Abstract. The early and late Eocene have both been the subject of many modelling studies, but few have focused on the middle Eocene. The latter still holds many challenges for climate modellers but is also key to understanding the events leading towards the conditions needed for Antarctic glaciation at the Eocene–Oligocene transition. Here, we present the results of CMIP5-like coupled climate simulations using the Community Earth System Model (CESM) version 1. Using a new detailed 38 Ma geography reconstruction and higher model resolution compared to most previous modelling studies and suffici

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Steinthorsdottir, Margret, Vivi Vajda, Mike Pole, and Guy Holdgate. "Moderate levels of Eocene pCO2 indicated by Southern Hemisphere fossil plant stomata." Geology 47, no. 10 (2019): 914–18. http://dx.doi.org/10.1130/g46274.1.

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Abstract Reducing the uncertainty in predictions of future climate change is one of today’s greatest scientific challenges, with many significant problems unsolved, including the relationship between pCO2 and global temperature. To better constrain these forecasts, it is meaningful to study past time intervals of global warmth, such as the Eocene (56.0–33.9 Ma), serving as climatic analogues for the future. Here we reconstructed pCO2 using the stomatal densities of a large fossil Lauraceae (laurel) leaf database from ten sites across the Eocene of Australia and New Zealand. We show that mostly

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Zachos, Louis G., and Ann Molineux. "Eocene echinoids of Texas." Journal of Paleontology 77, no. 3 (2003): 491–508. http://dx.doi.org/10.1017/s0022336000044206.

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Fourteen species of echinoids ranging in age from early to late Eocene, including four new species, are described from Texas. New taxa include Schizaster (Schizaster) caddoensis from the Reklaw and Weches Formations (Claiborne Group, middle Eocene), Schizaster (Schizaster) stenzeli and Eupatagus texanus from the Weches Formation, and Schizaster (Paraster) susana from the Caddell Formation (Jackson Group, upper Eocene). Fibularia meyeri (Aldrich, 1921) and Fibularia alabamensis Cooke, 1959 are synonymized with Fibularia texana (Twitchell, 1915) from the Weches and Cook Mountain Formations (Clai

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Huang, Huasheng, Robert Morley, Alexis Licht, et al. "Eocene palms from central Myanmar in a South-East Asian and global perspective: evidence from the palynological record." Botanical Journal of the Linnean Society 194, no. 2 (2020): 177–206. http://dx.doi.org/10.1093/botlinnean/boaa038.

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Abstract In the Palaeogene, pollen assemblages at low and mid latitudes are characterized by abundant palm and palm-like (PPL) taxa. Although these taxa have been widely reported, their occurrence in the Palaeogene of Myanmar remains poorly documented. Here we report on the morphology of PPL pollen along a middle to upper Eocene sedimentary sequence in central Myanmar and discuss their nearest living relatives (NLRs). Principal components analysis (PCA) indicates that Palmaepollenites kutchensis, Dicolpopollis and Longapertites were dispersed from freshwater plants, whereas the parent taxon of

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Jaramillo, Carlos A. "Response of tropical vegetation to Paleogene warming." Paleobiology 28, no. 2 (2002): 222–43. http://dx.doi.org/10.1666/0094-8373(2002)028<0222:rotvtp>2.0.co;2.

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The late Paleocene-early Eocene transition was characterized by a long period of global warming that culminated with the highest temperatures of the Cenozoic. This interval is associated with a significant increase in plant diversity in temperate latitudes. However, data from tropical regions remain largely unknown. The record of pollen and spore diversity across the late Paleocene to the early middle Eocene of eight sections in central and eastern Colombia was analyzed. Several techniques, including range-through method, rarefaction, bootstrap, detrended correspondence analysis, and Shannon i

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Lyubarsky, G., and E. Perkovsky. "New Species of Stilbus (Coleoptera, Clavicornia, Phalacridae) from the Late Eocene Rovno Amber." Vestnik Zoologii 45, no. 2 (2011): e-47-e-50. http://dx.doi.org/10.2478/v10058-011-0012-7.

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New Species ofStilbus(Coleoptera, Clavicornia, Phalacridae) from the Late Eocene Rovno AmberThe first Eocene species ofStilbusSeidlitz, 1872,S. bedovoyiLyubarsky et Perkovsky, sp. n., is described from Late Eocene Rovno amber.S. bedovoyiis most similar toStilbus atomarius(Linnaeus) and differs from it by smaller body size, strong and large punctation of elytra, and broadly oval apex of elytra.

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NGÔ-MULLER, VALERIE, ROMAIN GARROUSTE, and ANDRÉ NEL. "The oldest long-legged fly of the subfamily Medeterinae (Diptera: Dolichopodidae) from the Early Eocene of France." Palaeoentomology 3, no. 2 (2020): 173–79. http://dx.doi.org/10.11646/palaeoentomology.3.2.6.

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We describe Paleothrypticus eocenicus gen. et sp. nov., oldest and first Medeterinae from the Early Eocene Oise amber (France). Representatives of the tribes Medeterini and Systenini are recorded in the Middle Eocene Baltic amber and the Miocene amber of Mexico. These fossils show that this subfamily was already well diversified at the beginning of the Eocene.

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NEL, ANDRÉ. "The second genus of the extinct dragonfly family Urolibellulidae from the Eocene Green River Formation (Odonata, Anisoptera: Cavilabiata)." Palaeoentomology 3, no. 1 (2020): 050–53. http://dx.doi.org/10.11646/palaeoentomology.3.1.7.

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If the oldest record of the anisopteran ‘libelluloid’ group Anauriculida Bechly, 1996 goes to the Cretaceous (Fleck et al., 1999; Kohli et al., 2016), its extant families are scarce or even absent before the Eocene. Nevertheless, the Anauriculida were already rather diverse during Eocene with a Libellulidae in the earliest Eocene (Fleck et al., 2000), and the extinct monotypic family Urolibellulidae in the middle Eocene Green River Formation (Zeiri et al., 2015). Crown Libellulidae become more and more frequent and diverse during Oligocene, and even dominate the dragonfly fauna in some outcrop

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Pascher, K. M., C. J. Hollis, S. M. Bohaty, G. Cortese, and R. M. McKay. "Expansion and diversification of high-latitude radiolarian assemblages in the late Eocene linked to a cooling event in the Southwest Pacific." Climate of the Past Discussions 11, no. 4 (2015): 2977–3018. http://dx.doi.org/10.5194/cpd-11-2977-2015.

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Abstract. The Eocene was characterised by "greenhouse" climate conditions that were gradually terminated by a long-term cooling trend through the middle and late Eocene. This long-term trend was determined by several large-scale climate perturbations that culminated in a shift to "ice-house" climates at the Eocene–Oligocene Transition. Geochemical and micropaleontological proxies suggest that tropical-to-subtropical sea-surface temperatures persisted into the late Eocene in the high-latitude Southwest Pacific Ocean. Here, we present radiolarian microfossil assemblage and foraminiferal oxygen a

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Lyubarsky, G., and E. Perkovsky. "The First Eocene Species of the Genus Micrambe (Coleoptera, Clavicornia, Cryptophagidae)." Vestnik Zoologii 44, no. 3 (2010): e-37-e-40. http://dx.doi.org/10.2478/v10058-010-0017-7.

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The First Eocene Species of the GenusMicrambe(Coleoptera, Clavicornia, Cryptophagidae)Based on a fossil specimen from the Late Eocene Rovno amber (Ukraine),Micrambe sarnensisLyubarsky et Perkovsky, sp. n., the first Eocene species of this genus is described. The new species is similar to the extantMicrambe abietis(Paykull) andM. ulicis(Stephens), differing by having the callosity with an acutangular caudolateral corner.

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Lyubarsky, G., and E. Perkovsky. "The First Eocene Species of the Genus Cryptophagus (Coleoptera, Clavicornia, Cryptophagidae)." Vestnik Zoologii 46, no. 1 (2012): e-36-e-40. http://dx.doi.org/10.2478/v10058-012-0007-z.

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The First Eocene Species of the GenusCryptophagus(Coleoptera, Clavicornia, Cryptophagidae)Based on a fossil specimen from the Late Eocene Rovno amber (Ukraine),Cryptophagus harenusLyubarsky et Perkovsky, sp. n., an Eocene species of this genus is described. The new species is similar to the extant desert speciesCryptophagus desertusLyubarsky andC. recticollisSolsky, differing by the large callosity occupying 1/4 length of lateral margin of pronotum.

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Herold, N., J. Buzan, M. Seton, et al. "A suite of Early Eocene (~55 Ma) climate model boundary conditions." Geoscientific Model Development Discussions 7, no. 1 (2014): 529–62. http://dx.doi.org/10.5194/gmdd-7-529-2014.

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Abstract. We describe a set of Early Eocene (~55 Ma) climate model boundary conditions constructed in a self-consistent reference frame and incorporating recent data and methodologies. Given the growing need for uniform experimental design within the Eocene climate modelling community, we make publically available our datasets of Eocene topography, bathymetry, tidal dissipation, vegetation, aerosol distributions and river runoff. Particularly our Eocene topography and bathymetry has been significantly improved compared to previously utilized boundary conditions. Major improvements include the

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SONG, XIANG-BO, XING-NENG LIAN, XUE-FEI YU, et al. "Discovery of late Eocene amber from the Maoming Basin, Guangdong Province." Palaeoentomology 8, no. 2 (2025): 129–37. https://doi.org/10.11646/palaeoentomology.8.2.3.

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The Eocene was characterized by globally warm climates and high biodiversity, making Eocene amber a valuable resource for reconstructing palaeoenvironment and continental palaeobiota. The Maoming Basin in West Guangdong Province, South China, preserves a rich fossil record of Eocene-Oligocene biota, indicative of a humid subtropical climate. Here we report two distinct amber types from the Youganwo Formation of Maoming Basin, found in Huidang village and Yezi village, respectively. The first type, from Huidang village, represents the most abundant and largest amber specimens documented in Guan

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Yan, Kai, Chunlian Wang, Renyi Chen, Jiuyi Wang, Ruiqin Li, and Lihong Liu. "The Geochemical Characteristics and Environmental Implications of the Paleocene–Eocene in the Jiangling Depression, Southwestern Jianghan Basin." Minerals 14, no. 3 (2024): 234. http://dx.doi.org/10.3390/min14030234.

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Various isotopic and palynological indicators have shown interspersed periods of aridity and humidity for the late Paleocene to early Eocene in central China, so the paleoclimate conditions remain unclear. This research investigates the environmental characteristics of a saline lake in the Jiangling depression, southwestern Jianghan Basin, from the Paleocene to the Eocene, using bulk-rock geochemistry in a 1280 m sediment core. The ratios of FeO/MnO, Al2O3/MgO, and C-value indicate a semi-humid to semi-arid climate in the early–middle Paleocene. There was a rapid shift to a humid climate durin

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DROHOJOWSKA, JOWITA, WERONIKA BOGUSIAK, SONIA KURKINA, MARZENA ZMARZŁY, and JACEK SZWEDO. "A new species of Eocene whitefly—Snotra herczeki sp. nov. (Hemiptera, Sternorrhyncha, Aleyrodidae) from Baltic amber." Zootaxa 5382, no. 1 (2023): 139–45. http://dx.doi.org/10.11646/zootaxa.5382.1.15.

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The second species of the Aleyrodinae whitefly genus Snotra Szwedo et Drohojowska, 2016 is described based on an inclusion in the Eocene Baltic amber. It is second species of the genus, adding new data to knowledge on disparity and taxonomic diversity of whiteflies in the Eocene Baltic amber. The diversity of the group and its fossil record in the Eocene fossil resins is briefly discussed.

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Port, Ulrike, Martin Claussen, and Victor Brovkin. "Radiative forcing and feedback by forests in warm climates – a sensitivity study." Earth System Dynamics 7, no. 3 (2016): 535–47. http://dx.doi.org/10.5194/esd-7-535-2016.

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Abstract. We evaluate the radiative forcing of forests and the feedbacks triggered by forests in a warm, basically ice-free climate and in a cool climate with permanent high-latitude ice cover using the Max Planck Institute for Meteorology Earth System Model. As a paradigm for a warm climate, we choose the early Eocene, some 54 to 52 million years ago, and for the cool climate, the pre-industrial climate, respectively. To isolate first-order effects, we compare idealised simulations in which all continents are covered either by dense forests or by deserts with either bright or dark soil. In co

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Liu, X. Y., Q. Gao, M. Han, and J. H. Jin. "The <i>p</i>CO<sub>2</sub> estimates of the late Eocene in South China based on stomatal density of <i>Nageia</i> Gaertner leaves." Climate of the Past Discussions 11, no. 4 (2015): 2615–47. http://dx.doi.org/10.5194/cpd-11-2615-2015.

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Abstract. late Eocene pCO2 concentration is estimated based on the species of Nageia maomingensis Jin et Liu from the late Eocene of Maoming Basin, Guangdong Province. This is the first paleoatmospheric estimates for the late Eocene of South China using stomatal data. Studies of stomatal density (SD) and stomatal index (SI) with N. motleyi (Parl.) De Laub., the nearest living equivalent species of the fossil, indicate that the SD inversely responds to atmospheric CO2 concentration, while SI has almost no relationships with atmospheric CO2 concentration. Therefore, the pCO2 concentration is rec

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Kapur, Vivesh V., and Sunil Bajpai. "Oldest South Asian tapiromorph (Perissodactyla, Mammalia) from the Cambay Shale Formation, western India, with comments on its phylogenetic position and biogeographic implications." Journal of Palaeosciences 64, no. (1-2) (2015): 95–103. http://dx.doi.org/10.54991/jop.2015.104.

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A new tapiromorph perissodactyl (Cambaylophus vastanensis gen. et sp. nov.) from the basal Eocene (~54–55 Ma) Cambay Shale Formation, Vastan Lignite Mine, Gujarat, western India, is described for the first time. The new taxon, which represents the earliest known tapiromorph from South Asia and the second perissodactyl group in the Vastan mammal fauna after cambaytheres, is based on a partial maxilla with molars and deciduous premolars. Cambaylophus differs from Eocene tapiromorphs from the Indian Subcontinent mainly in having relatively narrow and less lophodont upper molars with a small, low

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