Results 211 to 220 of about 6,689 (261)

The fate of South America's endemic mammalian fauna in response to the most dramatic Cenozoic climate disruption. [PDF]

Proc Natl Acad Sci U S A
Buffan L, Condamine FL, Stutz NS, Pujos F, Antoine PO, Marivaux L.   +5 more
europepmc   +1 more source

Lithofacies, diagenesis, and chemostratigraphy of the microbialite and marginal lacustrine carbonate units within the Green River Formation, eastern Uinta Basin, Colorado and Utah

, 2017
Abdulah Eljalafi
openalex   +1 more source

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Neoproterozoic chemostratigraphy

Precambrian Research, 2010
Chemostratigraphy has diverse applications to investigating the rock record, such as reconstructing paleoenvironments, determining the tectonic setting of sedimentary basins, indirect dating, and establishing regional or global correlations. Chemostratigraphy is thus an integral component of many investigations of the ancient sedimentary record.
Matthew T Hurtgen
exaly   +3 more sources

Chemostratigraphy of the Posidonia Black Shale, SW-Germany

Chemical Geology, 2004
Abstract During the Toarcian, widespread deposition of organic-rich mudrocks (black shales) occurred across Europe, linked to a 3rd-order sea-level rise. We provide a high-resolution, multi-proxy chemostratigraphic study of the Dotternhausen sections in SW Germany embedded in a stratigraphic and palecological framework.
Lorenz Schwark
exaly   +5 more sources

Ediacaran δ13C chemostratigraphy of South China

Chemical Geology, 2007
Abstract We report new δ13C chemostratigraphic data of the Ediacaran System in South China. Using litho- and biostratigraphic markers as independent calibrators, we combine new and previously published δ13C data to construct a composite δ13C profile for the Ediacaran System in South China. The composite curve shows, in chronostratigraphic order, 1) a
Chuanming Zhou, Shuhai Xiao
openaire   +1 more source

Neoproterozoic marine chemostratigraphy, or eustatic sea level change?

Palaeogeography, Palaeoclimatology, Palaeoecology, 2021
Abstract Paleosols are characterized with new chemical and petrographic data from the Tonian (776–729 Ma) Chuar Group in the eastern Grand Canyon, Arizona. Paleosols have been discovered at 66 stratigraphic levels in a 1622 m sequence largely of marine shales and thin intertidal stromatolitic dolostones. A purple paleosol association includes gypsum “
Gregory J. Retallack, Adrian P. Broz, Larry S.-H. Lai, Kevin Gardner   +3 more
openaire   +1 more source

Chapter 4.4 Chemostratigraphy

2009
Abstract Carbon- and strontium-isotope data from the Mina Verdun, Arroyo del Soldado and Sierras Bayas groups are summarised and discussed. Mn/Sr ratios and δ 13 C versus δ 18 O crossplots for the Mina Verdun Group at its stratotype show that δ 13 C reflects seawater composition.
Claudio Gaucher, Alcides N. Sial, Daniel Poiré, Lucia Gómez Peral, Valderez P. Ferreira, Marcio M. Pimentel   +5 more
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Chapter 4 Chemostratigraphy and the Neoproterozoic glaciations

Geological Society, London, Memoirs, 2011
Abstract Although the pre-glacial Proterozoic isotopic record is poorly constrained, it is apparent that the chemical and isotopic composition of the oceans began to change during the early to mid-Neoproterozoic and experienced considerable fluctuations alongside climatic instability during much of the subsequent Cryogenian and ...
Galen P. Halverson, Graham Shields-Zhou
openaire   +1 more source