Results 31 to 40 of about 8,027 (255)

A Cenozoic-style scenario for the end-Ordovician glaciation [PDF]

, 2014
The end-Ordovician was an enigmatic interval in the Phanerozoic, known for massive glaciation potentially at elevated CO2 levels, biogeochemical cycle disruptions recorded as large isotope anomalies and a devastating extinction event.
Achab, A, Asselin, E, Dabard, MP, Desrochers, A, Farley, C, Ghienne, JF, LOI, ALFREDO, Paris, F, Vandenbroucke, TRA, Veizer, J., Wickson, S   +10 more
core   +7 more sources

Sequence stratigraphy, chemostratigraphy and facies analysis of Cambrian Series 2 – Series 3 boundary strata in northwestern Scotland [PDF]

, 2016
Globally, the Series 2 – Series 3 boundary of the Cambrian System coincides with a major carbon isotope excursion, sea-level changes and trilobite extinctions.
Faggetter, Luke, FAGGETTER, LUKE E., Joachimski, Michael, JOACHIMSKI, MICHAEL M., NEWTON, ROBERT J., Pruss, Sara, PRUSS, SARA B., Raine, Robert, RAINE, ROBERT J., Smith, Paul, SMITH, PAUL M., SUN, YADONG, WIDDOWSON, MIKE, Wignall, P B, WIGNALL, PAUL B.   +14 more
core   +1 more source

Chemostratigraphy of Upper Carboniferous (Pennsylvanian) sequences from the Southern North Sea (United Kingdom) [PDF]

, 2010
Important gas reservoirs occur in the Upper Carboniferous coal measures and red beds of the Southern North Sea. The thick red beds of the Boulton and Ketch formations are difficult to correlate, due to poor internal seismic definition, repetitive e-log ...
Cooper, Diana, Martin, John H., Pearce, Tim J., Wray, David S.   +3 more
core   +1 more source

Gamma-ray, stable carbon and oxygen isotope chemostratigraphy and sequence stratigraphy of the Lower Mahil Formation (KS-1 Khuff-Equivalent), Northern Oman

Frontiers in Earth Science, 2023
This research presents findings from a study focused on the Lower Triassic (Induan) Lower Mahil KS-1 Formation, situated on a homoclinal carbonate platform in Northern Oman.
M. S. Moustafa, Rasha Al Raqaishi, M. El‐Ghali, Mohamed Gharbi, I. Abbasi, Aaraf Al Humaidi, Nada Al Ghafri, Marwa Musallam Alshukaili, Hezam Al-Awah   +8 more
semanticscholar   +1 more source

⁸⁷Sr/⁸⁶Sr chemostratigraphy of Neoproterozoic Dalradian limestones of Scotland and Ireland: constraints on depositional ages and time scales [PDF]

, 2004
New calcite ⁸⁷Sr/⁸⁶Sr data for 47 limestones from the metamorphosed and deformed Neoproterozoic-Cambrian Dalradian Supergroup of Scotland and Ireland are used to identify secular trends in seawater <sup>
Ellam, R.M., Fallick, A.E., Graham, C.M., Thomas, C.W.   +3 more
core   +1 more source

Carbon isotope chemostratigraphy, geochemistry, and biostratigraphy of the Paleocene–Eocene Thermal Maximum, deepwater Wilcox Group, Gulf of Mexico (USA)

Climate of the Past, 2023
. The Paleocene–Eocene Thermal Maximum (PETM) represents the most pronounced hyperthermal of the Cenozoic era and is hypothesized to have resulted in an intensification of the paleohydrologic cycle, including enhanced seasonality and increased sediment ...
G. Sharman, E. Szymanski, Rebecca A. Hackworth, A. Kahn, Lawrence A. Febo, J. Oefinger, Gunnar M. Gregory   +6 more
semanticscholar   +1 more source

ORGANIC GEOCHEMICAL ASSESSMENT AND SHALE GAS POTENTIAL OF LOWER SILURIAN ORGANIC RICH SHALE IN THE GHADAMES BASIN, NORTH AFRICA; pp. 337–352 [PDF]

Oil Shale, 2019
The Silurian organic rich shale is the main source of hydrocarbons in the Ghadames Basin in North Africa. The basin has been widely characterized as a source rock for Ordovician oil and gas; yet understanding this shale as a shale resource play remains ...
KAMEL DADI, RIADH AHMADI, JAMEL ABDENNACEUR OUALI   +2 more
doaj   +1 more source

Using elemental chemostratigraphy on Mid-Late Frasnian platform-top successions from the Lennard Shelf outcrops, Canning Basin, Western Australia. [PDF]

, 2017
High-resolution chronostratigraphic correlation using elemental chemostratigraphy in platform carbonates is typically difficult to achieve. Here, elemental chemostratigraphy is used to correlate between two platform-top, carbonate-dominated field ...
Caulfield-Kerney, Samuel, Haines, Peter W, Hocking, Roger M, Kirschvink, Joseph, Montgomery, Paul, Playton, Ted E., Ratcliffe, Kenneth, Tohver, Eric, Wray, David, Yan, Maodu   +9 more
core   +1 more source

Latest Ordovician age of the Spinachitina fragilis Chitinozoan Biozone in Baltoscandia [PDF]

Estonian Journal of Earth Sciences, 2023
The global Spinachitina fragilis Chitinozoan Biozone has been considered the lowermost Silurian zone in most publications. S. fragilis was first described from the Ohesaare drill core, Estonia, and utilised as a Baltic regional zonal taxon together with ...
Jaak Nõlvak, Yan Liang, Olle Hints
doaj   +1 more source

The laurentian record of neoproterozoic glaciation, tectonism, and eukaryotic evolution in Death Vally, California [PDF]

, 2013
Neoproterozoic strata in Death Valley, California contain eukaryotic microfossils and glacial deposits that have been used to assess the severity of putative Snowball Earth events and the biological response to extreme environmental change.
A. E. Fallick, A. R. Prave, Aitken, ALLISON, Allison, Armin, Bekker, Berney, BOND, Bowring, Brasier, BURCHFIEL, CLOUD, Cohen, Colpron, CORSETTI, Corsetti, Corsetti, D. Trotzuk, Dalziel, Dalziel, E. F. Smith, Erwin, F. A. Macdonald, F. Waechter, Fanning, FLECK, Goodge, Gutstadt, HOFFMAN, Hoffman, Hoffmann, James, K. Oates, Karlstrom, Kaufman, Kenny, Knauth, Labotka, Licari, Love, Lund, Macdonald, Macdonald, MILLER, Moores, NOBLE, Prave, R. Petterson, S. B. Pruss, Sears, SNOW, Snow, Snow, Timmons, Tucker, Vorob'eva, Walker, WERNICKE, Wright, WRIGHT, Yin, Zhou   +62 more
core   +1 more source