Academic literature on the topic 'Sturtian'
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Journal articles on the topic "Sturtian"
Park, Yuem, Nicholas L. Swanson-Hysell, Scott A. MacLennan, Adam C. Maloof, Mulubrhan Gebreslassie, Marissa M. Tremblay, Blair Schoene, et al. "The lead-up to the Sturtian Snowball Earth: Neoproterozoic chemostratigraphy time-calibrated by the Tambien Group of Ethiopia." GSA Bulletin 132, no. 5-6 (October 17, 2019): 1119–49. http://dx.doi.org/10.1130/b35178.1.
Full textRooney, Alan D., Chuan Yang, Daniel J. Condon, Maoyan Zhu, and Francis A. Macdonald. "U-Pb and Re-Os geochronology tracks stratigraphic condensation in the Sturtian snowball Earth aftermath." Geology 48, no. 6 (March 13, 2020): 625–29. http://dx.doi.org/10.1130/g47246.1.
Full textSmith, Loren H., Alan J. Kaufman, Andrew H. Knoll, and Paul Karl Link. "Chemostratigraphy of predominantly siliciclastic Neoproterozoic successions: a case study of the Pocatello Formation and Lower Brigham Group, Idaho, USA." Geological Magazine 131, no. 3 (May 1994): 301–14. http://dx.doi.org/10.1017/s0016756800011079.
Full textGoddéris, Y., Y. Donnadieu, A. Nédélec, B. Dupré, C. Dessert, A. Grard, G. Ramstein, and L. M. François. "The Sturtian ‘snowball’ glaciation: fire and ice." Earth and Planetary Science Letters 211, no. 1-2 (June 2003): 1–12. http://dx.doi.org/10.1016/s0012-821x(03)00197-3.
Full textMacLennan, Scott A., Michael P. Eddy, Arthur J. Merschat, Akshay K. Mehra, Peter W. Crockford, Adam C. Maloof, C. Scott Southworth, and Blair Schoene. "Geologic evidence for an icehouse Earth before the Sturtian global glaciation." Science Advances 6, no. 24 (June 2020): eaay6647. http://dx.doi.org/10.1126/sciadv.aay6647.
Full textMAMBWE, Pascal, Franck DELPOMDOR, Sébastien LAVOIE, Philippe MUKONKI, Jacques BATUMIKE, and Philippe MUCHEZ. "Sedimentary evolution and stratigraphy of the ~765–740 Ma Kansuki-Mwashya platform succession in the Tenke-Fungurume Mining District, Democratic Republic of the Congo." Geologica Belgica 23, no. 1-2 (July 3, 2020): 69–85. http://dx.doi.org/10.20341/gb.2020.022.
Full textLechte, Maxwell, and Malcolm Wallace. "Sub–ice shelf ironstone deposition during the Neoproterozoic Sturtian glaciation." Geology 44, no. 11 (September 12, 2016): 891–94. http://dx.doi.org/10.1130/g38495.1.
Full textLe Heron, D. P. "The significance of ice-rafted debris in Sturtian glacial successions." Sedimentary Geology 322 (June 2015): 19–33. http://dx.doi.org/10.1016/j.sedgeo.2015.04.001.
Full textBusfield, M. E., and D. P. Le Heron. "Sequencing the Sturtian icehouse: dynamic ice behaviour in South Australia." Journal of the Geological Society 171, no. 3 (January 30, 2014): 443–56. http://dx.doi.org/10.1144/jgs2013-067.
Full textLindsay, J. F., M. D. Brasier, G. Shields, V. V. Khomentovsky, and Y. A. Bat-Ireedui. "Glacial facies associations in a Neoproterozoic back-arc setting, Zavkhan Basin, western Mongolia." Geological Magazine 133, no. 4 (July 1996): 391–402. http://dx.doi.org/10.1017/s0016756800007561.
Full textDissertations / Theses on the topic "Sturtian"
Bishop, C. M. B. "Descent into the Cryogenian; secular trends in seawater chemistry offer insights into pre-Sturtian paleoenvironments." Thesis, 2018. http://hdl.handle.net/2440/130471.
Full textThe Tonian was a remarkable period in Earth’s history, experiencing dramatic changes in the Earth system that resulted in a series of global climatic catastrophes, ultimately leading to marked changes in the biosphere. The break-up of the supercontinent Rodinia is thought to have had a profound impact on the Earth system during the Tonian, ultimately resulting in the ~58 million-year deep freeze of the Sturtian glaciation. Increased continental margins and the weathering of vast continental flood basalts, promoting high levels of primary productivity, were large players in the drawdown of atmospheric CO2, the chemical implications of which resonate through Tonian ocean chemistry. The laterally extensive Skillogalee and Myrtle Springs Formations, within the Burra Group sediments of South Australia, span a pre-Sturtian carbonate succession that offer further insights into late Tonian paleo-environments. High resolution geochemical trends throughout the Skillogalee and Myrtle Springs Formations display evidence of a shift from a restricted to a more open marine setting, that was met with a flux of hydrothermally influenced waters. A hydrothermal flux through underlying basalts likely accounts for the enigmatic widespread deposition of sedimentary magnesites throughout the Skillogalee Formation. The longevity and regional reproducibility of significant europium anomalies suggests that a mafic mantle flux endured throughout Burra Group sedimentation. Cerium anomalies, supported by Zn/Fe ratios, evince open marine seawaters were largely dysoxic throughout the late Tonian, constraining Neoproterozoic oxygenation to post-Sturtian. Neodymium isotopes in Burra Group marine waters display a rise towards primitive endmembers, reflecting a mafic weathering flux, induced, no doubt, by the break-up of Rodinia. High levels of organic carbon burial are coupled with pronounced mafic weathering, detailing a mass drawdown of CO2 throughout Burra Group sedimentation during the late Tonian, hereby also holding important ramifications for the instatement of the Cryogenian glaciations.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2018
Petterson, Ryan. "I. Glaciagenic and Related Strata of the Neoproterozoic Kingston Peak Formation in the Panamint Range, Death Valley Region, California. II. The Basal Ediacaran Noonday Formation, Eastern California, and Implications for Laurentian Equivalents. III. Rifting of Southwest Laurentia During the Sturtian-Marinoan Interglacial: The Argenta Orogeny." Thesis, 2009. https://thesis.library.caltech.edu/1615/1/PETTERSON_THESIS.pdf.
Full textI. Glacigenic deposits in the Death Valley region occur within the Neoproterozoic Kingston Peak Formation. In the Panamint Range, immediately west of Death Valley, these strata are ≥1000 m thick and are continuously exposed for nearly 100 km along the strike of the range. Although these strata are variably metamorphosed and locally exhibit pronounced ductile strain, original sedimentary textures are well preserved throughout the range. Diamictic strata occur in two distinct intervals, a lower one comprising the Limekiln Spring and Surprise Members, and an upper one known as the Wildrose Sub-member of the South Park Member. Each of these intervals are succeeded by well defined cap carbonates, which, from oldest to youngest, are the Sourdough Member of the Kingston Peak and the Sentinel Peak Member of the overlying Noonday Formation. Between the two glacial successions, the Sourdough and sub-Wildrose South Park units comprise a ~300 m thick interglacial succession that includes platform carbonate deposition. Sparse lonestones and striated clasts, along with the impressive lateral continuity of diamictic units, support a glacial origin. Chemostratigraphic profiles of δ13C through the Sourdough (-3‰ to +2‰, increasing upward) and Sentinel Peak (-3‰ +/- 1‰) suggest correlation with the Sturtian and Marinoan caps, respectively. Potentially economic U deposits (secondary brannerite) occur in graphitic schists of the Limekiln Spring Member and sub-economic U and Th (hosted by detrital monazite) occur within quartz-pebble conglomerates in the South Park Member. The strata contain no fossils, radiometric age control, or primary magnetizations.
II. The Neoproterozoic-Cambrian succession in the Death Valley region of SW Laurentia is among the best exposed and easily accessible in the world, and comprises one of the most complete sections in Laurentia. The largest single exposure of these strata occurs in the Panamint Range on the west flank of Death Valley, but this area has received little attention in comparison to numerous exposures to the east of Death Valley, primarily because of structural complexity and metamorphism. The eastern strata, although unmetamorphosed, occur in isolated fault-bounded exposures and are relatively thin and incomplete compared to the Panamint stratigraphy. These factors, combined with a lack of fossil or radiometric age control, has hindered confident regional correlation, as well as placement in the context of hallmark Neoproterozoic events observed in the South Australian, Namibian and other successions around the globe. New geological mapping, measured sections and high-resolution C-isotope data reported here from the Noonday Formation in the Panamint Range delineate its regional stratigraphic architecture and establish its age through correlation with section with radiometric age control. Carbon isotopic trends in the Panamint Range match to within 1-2‰ reproducibility previous results obtained for correlative strata in the eastern sections, indicating that metamorphism did not significantly alter C isotopic ratios.
The combined lithostratigraphic and chemostratigraphic data form the basis for a revised, more complete stratigraphic framework for the Noonday Formation. A composite section shows that, where most complete, the Noonday consists of three members, from the base upward, the Sentinel Peak, Radcliff, and Mahogany Flats members. New mapping and chemostratigraphic data permit robust regional correlation of a thin dolostone marker horizon at the base of the Noonday in the Panamint Range as little as 2 m thick (Sentinel Peak Member) with a tube-bearing microbial dolostone in the eastern Death Valley region more than 200 m thick. The data also reveal that the Radcliff Member is bounded by disconformable surfaces and their correlative conformities. These surfaces are recognizable throughout the region and are used to construct a regionally unified stratigraphic nomenclature.
A key finding of this study is the construction of a chemostratigraphic profile spanning most of Noonday time. This was greatly aided by the discovery of carbonatebearing strata in the lower part of the Radcliff Member in the Tucki Mountain area of the Panamints, and relating their stratigraphic position to upper Radcliff and younger Noonday strata in the Wildrose Canyon area. The chemostratigraphic profile is a remarkable match for the Maiberg cap carbonate sequence in Namibia, including the decline to a minimum at -5‰, a recovery to near 0‰, and then subsequent decline to -2‰. Globally, profiles through many post-Marinoan sequences are either too condensed or lack sufficient carbonate to record these features, including the sections in the eastern Death Valley region. (Halverson et al. 2005). As such, the Panamint profiles represent the first relatively complete record of the post-Marinoan C-isotopic recovery outside of southern Africa. Correlation of these curves (1) firmly places the Noonday at the base of the Ediacaran Period, (2) indicates deposition of ~200 m of Sentinel Peak and Radcliff strata occurred between 635 and 632 Ma, (3) supports the hypothesis that the Wildrose Diamictite of the Kingston Peak Formation, which lies in sharp contact below the Sentinel Peak Member, represents at least part of the Marinoan glacial interval; (4) helps identify correlative cap carbonate sequences in key Laurentian sections, which include the Ravensthroat Formation in the MacKenzie Mountains, dolostones capping the upper diamictite of the Pocatello Formation in eastern Idaho, and the middle part of the Mina el Mezquite Formation in Sonora. The Noonday C-isotopic profile confirms that the details of relatively rapid, complex variations in ocean chemistry observed in basal Ediacaran strata in Namibia are globally reproducible.
III. The Kingston Peak Formation in the Panamint Range represents the stratigraphically most complete section of Cryogenian strata along the SW margin of Laurentia. Two glacigenic diamictites and their associated cap carbonates, the older Surprise Member and Sourdough Member and the younger Wildrose Member and Noonday Formation (Sentinel Peak Member), provide timing constraints to bracket the inter-glacial succession to between ca. 713 Ma and 635 Ma, the ages of inferred correlative glacial cap carbonate rocks dated elsewhere. This timing constraint is further strengthened by the presence of a sharp decline in C isotopes in the Thorndike Member, which occurs immediately beneath the Wildrose Member; this decline is readily correlated with the global Trezona anomaly.
Within the inter-glacial succession, new mapping in the northern Panamints has documented the presence of a previously unrecognised suite of coarse sedimentary rocks herein defined as the Argenta Member of the Kingston Peak Formation. The Argenta consists largely of poorly-sorted breccias and conglomerates containing an assemblage of gravel-sized clasts dominated by granitic gneiss, schist, feldspar augens, vein quartz and quartzite fragments, and locally carbonate rocks. These compositions indicate derivation from a basement provenance and record deposition in alluvial-fan to coarse-braided fluvial settings; their textural and compositional immaturity implies relatively short distances of transport. Mapping shows that the Argenta defines wedge-shaped packages as much as 200 m thick and that the base of the Argenta is a significant angular unconformity. Combined, these features are evidence that deposition occurred during a phase of extensional tectonism interpreted as recording the initial dismemberment of the Rodinia supercontinent. Best estimates place the timing of this tectonism at ca. 650 – 700 Ma.
Vermaak, Pieter Johannes. "Die voedingswaarde van sommige Atriplex spesies en Cassia sturtii vir herkouers (Afrikaans)." Diss., 2010. http://hdl.handle.net/2263/27389.
Full textDissertation (MScAgric)--University of Pretoria, 2010.
Animal and Wildlife Sciences
unrestricted
Tucker, Jacqueline. "Nutritive value of Cassia sturtii, Sutherlandia microphylla and Medicago sativa for sheep." Diss., 2012. http://hdl.handle.net/2263/28320.
Full textDissertation (MSc(Agric))--University of Pretoria, 2013.
Animal and Wildlife Sciences
unrestricted
Wilcock, Trove Elizabeth. "Use of selected fodder shrubs in the reclamation of degraded arid rangelands." Diss., 2010. http://hdl.handle.net/2263/27304.
Full textDissertation (MScAgric)--University of Pretoria, 2010.
Plant Production and Soil Science
unrestricted
Books on the topic "Sturtian"
Gilbert, Dennis. Brightly gleams our banner: Methodism at Sturton-by-Stow, nr. Lincoln. Sturton-by-Stow: Sturton-by-Stow Methodist Church, 1987.
Find full textJessop, William R. H. Flindersland and Sturtland or the Inside and Outside of Australia: In Two Volumes. Sturtland; Volume 2. Creative Media Partners, LLC, 2015.
Find full textBook chapters on the topic "Sturtian"
Azimova, Shakhnoza S., and Anna I. Glushenkova. "Gossypium sturtianum J.H.Willis." In Lipids, Lipophilic Components and Essential Oils from Plant Sources, 618. London: Springer London, 2012. http://dx.doi.org/10.1007/978-0-85729-323-7_2013.
Full textAzimova, Shakhnoza S., and Anna I. Glushenkova. "Hibiscus sturtii Hook." In Lipids, Lipophilic Components and Essential Oils from Plant Sources, 625–26. London: Springer London, 2012. http://dx.doi.org/10.1007/978-0-85729-323-7_2033.
Full textBrookfield, Michael E., Mario Coniglio, Susan Glasauer, and Reuben Rieu. "Petrology, Elemental and Isotope Geochemistry and Geomicrobiology of Carbonate Infillings and Biofilms Lining Cracks Below the Neoproterozoic (Sturtian) Cap Carbonate in the Mirbat Inlier, Southernmost Oman." In Cellular Origin, Life in Extreme Habitats and Astrobiology, 525–40. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0397-1_23.
Full text"Sturtian Glaciation." In Encyclopedia of Astrobiology, 2400. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44185-5_101097.
Full text"Sturtian Glaciation." In Encyclopedia of Astrobiology, 1613. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-11274-4_3146.
Full textDehler, Carol M., Douglas A. Sprinkel, and Susannah M. Porter. "Neoproterozoic Uinta Mountain Group of northeastern Utah: Pre-Sturtian geographic, tectonic, and biologic evolution." In GSA Field Guide 6: Interior Western United States, 1–25. Geological Society of America, 2005. http://dx.doi.org/10.1130/2005.fld006(01).
Full textCrossing, A. R., and V. A. Gostin. "Isotopic signatures of carbonates associated with Sturtian (Neoproterozoic) glacial facies, central Flinders Ranges, South Australia." In Earth's Glacial Record, 165–75. Cambridge University Press, 1994. http://dx.doi.org/10.1017/cbo9780511628900.013.
Full textKeeley, Joshua A., and Paul K. Link. "Middle Cryogenian (“Sturtian”) Pocatello Formation: Field relations on Oxford Mountain and the Portneuf area, southeast Idaho." In Geologic Field Trips to the Basin and Range, Rocky Mountains, Snake River Plain, and Terranes of the U.S. Cordillera, 167–82. Geological Society of America, 2011. http://dx.doi.org/10.1130/2011.0021(07).
Full textYoung, G. M., and V. A. Gostin. "Late Proterozoic (Sturtian) succession of the North Flinders Basin, South Australia; An example of temperate glaciation in an active rift setting." In Geological Society of America Special Papers, 207–22. Geological Society of America, 1991. http://dx.doi.org/10.1130/spe261-p207.
Full textBrennan, Daniel T., David M. Pearson, Paul K. Link, and Jacob Milton. "Neoproterozoic to early Paleozoic tectono-stratigraphic framework for central Idaho: Windermere Supergroup in the northern sector of the U.S. Cordillera." In Laurentia: Turning Points in the Evolution of a Continent. Geological Society of America, 2022. http://dx.doi.org/10.1130/2022.1220(23).
Full textConference papers on the topic "Sturtian"
van Maldegem, L. M., M. Kipp, J. M. Hope, and J. J. Brocks. "Lipid Biomarkers Reveal a Bacterial Dominated Ecosystem after the Sturtian Glaciation." In 29th International Meeting on Organic Geochemistry. European Association of Geoscientists & Engineers, 2019. http://dx.doi.org/10.3997/2214-4609.201902748.
Full textBricker, Hayley, Aradhna Tripati, Ian Foster, Perrin Hagge, Arnaud Agranier, Stefan Lalonde, and Pierre Sansjofre. "Evidence for continental weathering and riverine input during the Sturtian Glaciation." In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.6611.
Full textSarvian, Niloufar, Andrew Jacobson, Matthew Hurtgen, Magdalena Osburn, and Adam C. Maloof. "Radiogenic and Stable Sr Isotope Records Preceding the Sturtian Snowball Earth Event." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.2285.
Full textYang, Chuan, Daniel Condon, Maoyan Zhu, Xian-Hua Li, and Chunlin Hu. "NEW ZIRCON U-PB GEOCHRONOLOGY ON THE STURTIAN DEGLACIATION IN SOUTH CHINA." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-321966.
Full textWang, Xubin. "The rapid recovery of marine productivity after the Sturtian Snowball Earth glaciation." In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.5533.
Full textTaylor, Holly, Anthony Dosseto, Juraj Farkas, Grant Cox, and Kelsey Lamothe. "The Aftermath of the Sturtian Glaciation: Reconstructing Palaeo- Seawater Chemistry and Silicate Weathering." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.2572.
Full textClavijo Arcos, Rolando E., Matthew Clarkson, Derek Vance, Alcides N. Sial, Marius N. Müller, and Netta Shalev. "Magnesium and Uranium isotope composition of the Sturtian Jacoca Formation cap dolomite, Brazil." In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.4210.
Full textWang, Ping, Yuansheng Du, Yuansheng Du, Thomas J. Algeo, Thomas J. Algeo, Wenchao Yu, Wenchao Yu, et al. "POST-STURTIAN SULFUR ISOTOPE ANOMALIES IN THE NANHUA BASIN, SOUTH CHINA RELATED TO UPWARD H2S MIGRATION." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-297093.
Full textPu, Judy P., Mark D. Schmitz, James L. Crowley, and Francis A. Macdonald. "GEOCHRONOLOGICAL CONSTRAINTS ON THE EMPLACEMENT OF THE FRANKLIN LIP: TESTING HYPOTHESES FOR THE ONSET OF THE STURTIAN SNOWBALL EARTH." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-298501.
Full textDu, Kim, Tanja Bosak, Sharon Newman, Francis A. Macdonald, Daniel J. G. Lahr, and Sara B. Pruss. "TUBULAR MICROFOSSILS PRESERVED BY AL-SI CLAY IN SHALLOW WATER CARBONATE FACIES OF THE POST-STURTIAN RASTHOF FORMATION (~660 MA), NORTHERN NAMIBIA." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-300660.
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