Results 11 to 20 of about 3,248,245 (131)

Assessing the Effect of Large Igneous Provinces on Global Oceanic Redox Conditions Using Non‐traditional Metal Isotopes (Molybdenum, Uranium, Thallium)

open access: yesGeophysical Monograph Series, Page 305-323., 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.
Brian Kendall   +2 more
wiley  

+9 more sources

The stratigraphie distribution of antiarch remains (Pisces, Placodermi) in Devonian of southern regions of Russia

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2015
The stratigraphic distribution of antiarch remains in the Middle-Upper Devonian of central, southern and east-south regions of East European Platform (EEP), western slope of South Urals and Siberia are analyzed.
S. V. Moloshnikov
doaj   +1 more source

GIVETIAN–FRASNIAN BOUNDARY CONODONTS FROM KERMAN PROVINCE, CENTRAL IRAN

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2013
The Middle - Late Devonian boundary is investigated based on twenty-two conodont species and subspecies from three sections in the north and west of Kerman, southeastern central Iran.
HOSSEIN GHOLAMALIAN   +4 more
doaj   +1 more source

Geochemical characteristics and genesis of the Middle Devonian and the Middle Permian natural gas in the Sichuan Basin, China

open access: yesJournal of Natural Gas Geoscience, 2020
Breakthroughs have been made for the natural gas exploration of the Middle Devonian and the Middle Permian formations in the Sichuan Basin in recent years.
Zengye Xie   +9 more
doaj   +1 more source

Salt dissolution tectonism and origin of lacustrine carbonate beds: Mn‐Fe‐calcite and Mn‐siderite micro‐spherulite fabrics of the Lower Cretaceous McMurray Formation, Athabasca Oil Sands deposit, western Canada

open access: yesThe Depositional Record, 2022
Several lacustrine carbonate beds, each a metre‐thick interval of densely packed Mn‐rich sideritic micro‐spherulites or Mn‐rich ferroan calcite micro‐spherulites, are recorded for the first time within strata of the Lower Cretaceous McMurray Formation of
Paul L. Broughton
doaj   +1 more source

Scientific and applied significance of late devonian paleontological thin sections collection (algoflora) stored in the Institute of Geological Sciences of the National Academy of Sciences of Ukraine

open access: yesМінеральні ресурси України, 2023
Information on the thin sections collection from Late Devonian deposits of Donets Basin, the Dnipro-Donets Depression, the Pre-Dobrudzhian and Lviv Paleozoic Toughs is provided.
O. A. Sukhov, A. D. Gusarova
doaj   +1 more source

Middle Devonian lycopsids from high southern palaeolatitudes of Gondwana (Argentina) [PDF]

open access: yes, 2002
Fossil plants are described from the upper part of the Devonian Lolén Formation, Sierra de la Ventana, Buenos Aires Province, Argentina, in the area of Estancia Las Acacias. The sequence is composed mainly of dark grey shales, and fossils were found in a
Cingolani, C. A.   +7 more
core   +1 more source

Middle Givetian to late Famennian (Middle to Late Devonian) conodonts from the northern margin of Gondwana (Kerman region, Central Iran).

open access: yes, 2020
The Givetian to Famennian (Middle-Upper Devonian) Bahram Formation deposits (Bondar and Shahzadeh Mohammad sections) in the Kerman region, Central Iran were sampled for conodonts.
ZAMANI F.   +5 more
core   +2 more sources

Devonian Sandstone Lithostratigraphy, Northern Arkansas [PDF]

open access: yes, 1977
Two areas of Devonian sandstone development may be recognized in northern Arkansas. In northwestern Arkansas, the Clifty Formation comprises a massively bedded, super mature quartz arenite of Middle Devonian age overlain by thinner bedded, phosphatic ...
Manger, Walter L., Hall, Jeffery D.
core   +3 more sources

Stratigraphic distribution and systematic composition of the Middle-Upper Devonian placoderms (anti-archs) from Central Kazakhstan

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2016
The stratigraphie distribution and systematic composition of the Middle-Upper Devonian remains of antiarchs from the sediments of Central Kazakhstan are analyzed. Central Kazakhstan ichthyofauna contains mainly endemic taxons of antiarchs.
S. V. Moloshnikov
doaj   +1 more source

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