Results 121 to 130 of about 7,297 (224)

Geochronology and Hf isotopic characteristics of detrital zircon from the miboshan formation in the eastern hexi corridor: implications for the relationship between the alxa block and the North China craton

Frontiers in Earth Science
This study presents U-Pb ages together with newly obtained systematic Hf isotopic data from detrital zircons of the Middle Ordovician Miboshan Formation in the eastern Hexi Corridor (northwestern China), aiming to constrain its provenance characteristics
Hongze Yang, Hongze Yang, Hongze Yang, Wenzhong Wu, Wenzhong Wu, Yu Ma, Yu Ma   +6 more
doaj   +1 more source

A new Lagerstätte from the late ordovician Big Hill Formation, Upper Peninsula, Michigan

, 2017
A new exceptionally preserved marginal marine biota is reported from the Late Ordovician Big Hill Formation of Stonington Peninsula in Michigan’s Upper Peninsula. The new Lagerstätte hosts a moderately diverse fauna of medusae, linguloid brachiopods, non-
Meyer, Ronald C., Lamsdell, James C., Gunderson, Gerald O., LoDuca, Steven T., Briggs, Derek E.G.   +4 more
core   +1 more source

Paleozoic Geography and Paleomagnetism of Kazakhstan [PDF]

, 2006
Der Norden Eurasiens besteht aus einer Vielzahl kontinentaler Blöcke (Baltika, Europa, Sibirien, Kasachstan, Turan und Tarim), die während des Karbons und Perms kollidierten.
Alexyutin, Maxim
core  

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

Gastropods in the Ordovician and Silurian successions on Anticosti island, eastern Canada

, 2006
Anticosti Island is located in the Gulf of St. Lawrence, Quebec, in eastern Canada. Relatively undisturbed Ordovician and Silurian sediments are preserved, with surface exposures ranging from the Ashgill (Rawtheyan) to the Llandovery (Telychian ...
Ebbestad, Jan Ove R.,
core  

Data from: Evolutionary and biogeographical shifts in response to the Late Ordovician mass extinction

, 2018
The Late Ordovician mass extinction was an interval of high extinction with inferred low ecological selectivity, resulting in little change in community structure after the event.
Patzkowksy, Mark E., Congreve, Curtis R., Krug, Andrew Z.   +2 more
core   +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

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

Cascading trend of Early Paleozoic marine radiations paused by Late Ordovician extinctions. [PDF]

Proc Natl Acad Sci U S A, 2019
Rasmussen CMØ, Kröger B, Nielsen ML, Colmenar J.   +3 more
europepmc   +1 more source