Results 91 to 100 of about 3,916,400 (215)

Correction to: A common arthropod from the Late Ordovician Big Hill Lagerstätte (Michigan) reveals an unexpected ecological diversity within Chasmataspidida. [PDF]

BMC Ecol Evol, 2021
Lamsdell JC, Gunderson GO, Meyer RC.
europepmc   +1 more source

Thermal History and Hydrocarbon Accumulation Stages in Majiagou Formation of Ordovician in the East-Central Ordos Basin

Energies
The marine carbonates in the Ordovician Majiagou Formation in the Ordos Basin have significant exploration potential. Research has focused on their thermal history and hydrocarbon accumulation stages, as these are essential for guiding the exploration ...
Hua Tao, Junping Cui, Fanfan Zhao, Zhanli Ren, Kai Qi, Hao Liu, Shihao Su   +6 more
doaj   +1 more source

Late Middle to Late Ordovician Phosphate Accumulation of the Moyero River Section (Siberia): A Record of Upwelling and Global Cooling

Russian Journal of Earth Sciences
The phosphate-bearing rocks (phosphate rocks and phosphorites) were studied over a 45-meter interval of the Moyero river section, covering the upper part of the Darriwilian and the lower part of the Sandbian stages of the Ordovician.
Lykov Nikita Andreevich, Rostovtseva Yu., Dronov Andrey   +2 more
doaj   +1 more source

BOUNDARY BETWEEN THE TIMANIAN AND URALIAN TECTONIC CYCLES: RESULTS OF DATING OF DETRITAL ZIRCONS FROM BASAL HORIZONS OF THE LOWER PALEOZOIC SYNRIFT COMPLEX OF THE POLAR URALS, AND IGNEOUS ROCK AGE DATA REPORT

Геодинамика и тектонофизика
The Upper Cambrian-Lower Ordovician terrigenous strata, unconformably overlying the Upper Riphean-Vendian rocks of the Timanide orogen in the north of the Urals, and contemporaneous bimodal volcanics and intrusive rocks are considered complexes marking ...
A. A. Soboleva, N. Yu. Nikulova, V. B. Khubanov   +2 more
doaj   +1 more source

Reconstructing the Climatic-Oceanic Environment and Exploring the Enrichment Mechanism of Organic Matter in the Black Shale across the Late Ordovician-Early Silurian Transition on the Upper Yangtze Platform Using Geochemical Proxies. [PDF]

ACS Omega, 2020
Wei Z, Wang Y, Wang G, Zhang T, He W, Ma X.   +5 more
europepmc   +1 more source

Enhanced Continental Weathering Triggered the Anoxia of Seawater and Mass Extinctions During the Late Ordovician

Journal of Marine Science and Engineering
During the Late Ordovician period, changes in climate and mass extinctions were observed; however, the factors influencing these phenomena have not been fully understood.
Pan Tang, Xiangrong Yang, Detian Yan
doaj   +1 more source

Halkieriid-like animals in the Late Ordovician?

, 2017
The recent description of the Tremadocian halkieriid-like stem aculiferan, Calvapilosa kroegeri, could shed new light on some enigmatic Ordovician fossils known only by their disarticulated plates. Specifically, Conchopeltis alternata could be interpreted as a plate of sclerite-bearing stem aculiferan.
openaire   +1 more source

Phylogenetic paleobiogeography of Late Ordovician Laurentian brachiopods

Estonian Journal of Earth Sciences, 2014
Phylogenetic biogeographic analysis of four brachiopod genera was used to uncover large-scale geologic drivers of Late Ordovician biogeographic differentiation in Laurentia. Previously generated phylogenetic hypotheses were converted into area cladograms, ancestral geographic ranges were optimized and speciation events characterized as via dispersal or
Jennifer E. Bauer, Alycia L. Stigall
openaire   +1 more source

Ocean euxinia and climate change “double whammy” drove the Late Ordovician mass extinction

, 2018
C. Zou, Qiu Zhen, S. Poulton, D. Dong, Hongyan Wang, Daizhao Chen, Lu Bin, Zhensheng Shi, Huifei Tao   +8 more
semanticscholar   +1 more source

A common arthropod from the Late Ordovician Big Hill Lagerstätte (Michigan) reveals an unexpected ecological diversity within Chasmataspidida. [PDF]

BMC Evol Biol, 2019
Lamsdell JC, Gunderson GO, Meyer RC.
europepmc   +1 more source