Results 11 to 20 of about 3,638 (277)

Introduction to the “Circum-Arctic Palynological Event Stratigraphy” (CAPE) series of papers

open access: bronzeAtlantic Geology, 2021
Palynomorphs are one of the few groups of fossils that provide biostratigraphic control in marine to nonmarine rocks and can be applied as proxies for paleoenvironmental and paleoclimatic interpretations. Their utility is enhanced by their microscopic size, which is usually less than 200 micrometres; they are thus easily recovered from small rock ...
J P Bujak   +3 more
openalex   +3 more sources

Large Igneous Province Record Through Time and Implications for Secular Environmental Changes and Geological Time‐Scale Boundaries

open access: yesGeophysical Monograph Series, Page 1-26., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Richard E. Ernst   +8 more
wiley  

+15 more sources

BILOZERSKA SERIES OF THE UKRAINIAN SHIELD: PROBLEMS OF STRATIGRAPHY AND CORRELATION

open access: yesGeological Journal, 2023
The article discusses the problematic issues of the geological structure of the Bilozersky synclinorium of the Ukrainian Shield, its stratigraphic structure, formation composition and absolute age of the rock associations that compose it. The interrelationships of interregional correlation of the Bilozerska and Kryvyi Rih series of the Ukrainian Shield
V.V. Pokalyuk   +2 more
openaire   +3 more sources

Miaolingian (Cambrian) trilobite biostratigraphy and carbon isotope chemostratigraphy in the Tingskullen drill core, Öland, Sweden [PDF]

open access: yesEstonian Journal of Earth Sciences, 2021
The Cambrian succession of the Tingskullen drill core from northern Öland comprises Cambrian Series 2 and Miaolingian (Wuliuan Stage) siliciclastic strata.
Per Ahlberg   +5 more
doaj   +1 more source

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

open access: greenGeological Magazine, 2016
AbstractGlobally, the Series 2 – Series 3 boundary of the Cambrian System coincides with a major carbon isotope excursion, sea-level changes and trilobite extinctions. Here we examine the sedimentology, sequence stratigraphy and carbon isotope record of this interval in the Cambrian strata (Durness Group) of NW Scotland.
Luke E. Faggetter   +8 more
openalex   +5 more sources

Quaternary stratigraphic regionalization and comprehensive framework in Nanling and adjacent areas

open access: yes地质科技通报, 2021
The Quaternary sediments in the Nanling and adjacent areas are dominated by alluvial, eluvium and cave deposits, which have lacked of a unified stratigraphic and chronological framework.Based on the results of field survey and research on profiles, the ...
Yuanrun Shi   +4 more
doaj   +1 more source

Insights Into Magma Chamber Processes From the Relationship Between Fabric and Grain Shape in Troctolitic Cumulates

open access: yesFrontiers in Earth Science, 2020
The strength of foliations defined by shape preferred orientation of plagioclase in troctolitic cumulates from the Layered Series of the Skaergaard intrusion, and the Rum Eastern Layered Intrusion, increases as the grains become more tabular, due either ...
Marian B. Holness   +3 more
doaj   +1 more source

Geotechnical Characteristic Assessments of Floodplain Soils Using SCPTU Data in Nanjing, China

open access: yesAdvances in Civil Engineering, 2022
In order to improve the understanding of such floodplain sediments and determining the validity of the tests, an extensive series of multifunctional seismic piezocone tests with pore pressure dissipation phase have been performed and supplemented with ...
Mingfei Zhang, Liyuan Tong, Qiang Wang
doaj   +1 more source

Global Series and Stages for the Ordovician System: A Progress Report

open access: yesGeologica Acta, 2005
There is no global standard set of chronostratigraphic/geochronologic subdivisions for the Ordovician System/Period. British series/epochs are often used as de facto nomenclature on stratigraphic correlation charts and geologic time scales. However, they
S. FINNEY
doaj   +1 more source

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