Results 1 to 10 of about 7,297 (224)

The Truong Son, Loei-Phetchabun, and Kontum Terranes in Indochina: Provenance, Rifting, and Collisions

Frontiers in Earth Science, 2021
The three main regions of Indochina are defined as the Truong Son, Loei-Phetchabun, and Kontum terranes. The aim of this review is to integrate numerous petrological studies with sedimentary, palaeontological, and provenance studies in order to construct
Clive Burrett, Mongkol Udchachon, Mongkol Udchachon, Hathaithip Thassanapak   +3 more
doaj   +1 more source

The Accumulation Characteristics of the Paleozoic Reservoir in the Central-Southern Ordos Basin Recorded by Organic Inclusions

Geofluids, 2021
The Permian tight clastic reservoir and Ordovician carbonate reservoir were developed in the central-southern Ordos Basin. This study investigated the fluid inclusion petrography, diagenetic fluid characteristics, formation process of natural gas ...
Ruijing Zhu, Rongxi Li, Xiaoli Wu, Xiaoli Qin, Bangsheng Zhao, Futian Liu, Di Zhao   +6 more
doaj   +1 more source

Mercury spikes suggest volcanic driver of the Ordovician-Silurian mass extinction

Scientific Reports, 2017
The second largest Phanerozoic mass extinction occurred at the Ordovician-Silurian (O-S) boundary. However, unlike the other major mass extinction events, the driver for the O-S extinction remains uncertain.
Qing Gong, Xiangdong Wang, Laishi Zhao, Stephen E. Grasby, Zhong-Qiang Chen, Lei Zhang, Yang Li, Ling Cao, Zhihong Li   +8 more
doaj   +1 more source

First report of an aulaceratid stromatoporoid from the Ordovician of Baltica [PDF]

Estonian Journal of Earth Sciences
The aulaceratid stromatoporoids first appeared in the late Middle Ordovician and had achieved a worldwide distribution in tropical to subtropical shallow-marine environments by the Late Ordovician; however, their presence in Baltica has not been ...
Juwan Jeon, Ursula Toom
doaj   +1 more source

Five new malformed trilobites from Cambrian and Ordovician deposits from the Natural History Museum [PDF]

PeerJ, 2023
Injured trilobites present insight into how a completely extinct group of arthropods responded to traumatic experiences, such as failed predation and moulting complications.
Russell D.C. Bicknell, Patrick M. Smith
doaj   +2 more sources

Geochemical Records Reveal Protracted and Differential Marine Redox Change Associated With Late Ordovician Climate and Mass Extinctions

AGU Advances, 2022
The Ordovician (Hirnantian; 445 Ma) hosts the second most severe mass extinction in Earth history, coinciding with Gondwanan glaciation and increased geochemical evidence for marine anoxia.
Nevin P. Kozik, Benjamin C. Gill, Jeremy D. Owens, Timothy W. Lyons, Seth A. Young   +4 more
doaj   +1 more source

Miospore assemblages from Late Ordovician (Katian-Hirnantian), Ghelli Formation, Alborz Mountain Range North-eastern Iran: Palaeophytogeographic and palaeoclimatic implications [PDF]

Journal of Sciences, Islamic Republic of Iran, 2016
Well-preserved miospore assemblages are recorded from the Late Ordovician (Katian-Hirnantian), Ghelli Formation in Pelmis-gorge at the north-eastern Alborz Mountain The palynomorphs were extracted from siliciclastic deposits which are well-dated by using
M. Ghavidel-syooki
doaj  

New Perspectives on Glacial Geomorphology in Earth’s Deep Time Record

Frontiers in Earth Science, 2022
The deep time (pre-Quaternary) glacial record is an important means to understand the growth, development, and recession of the global cryosphere on very long timescales (106–108 Myr).
D. P. Le Heron, M. E. Busfield, X. Chen, M. Corkeron, M. Corkeron, B. J. Davies, P. Dietrich, J-F. Ghienne, C. Kettler, L. Scharfenberg, T. M. Vandyk, R. Wohlschlägl   +11 more
doaj   +1 more source

Key oil accumulation periods of ultra-deep fault-controlled oil reservoir in northern Tarim Basin, NW China

Petroleum Exploration and Development, 2022
A giant fault-controlled oilfield has been found in the ultra-deep (greater than 6000 m) Ordovician carbonate strata in the northern Tarim Basin. It is of great significance for hydrocarbon accumulation study and oil exploitation to determine the key oil
Shuai YANG, Guanghui WU, Yongfeng ZHU, Yintao ZHANG, Xingxing ZHAO, Ziye LU, Baoshou ZHANG   +6 more
doaj   +1 more source

Warm-water Dasycladaceae algae from the Late Ordovician of the Parahio Valley, Spiti, India [PDF]

Estonian Journal of Earth Sciences, 2019
Warm-water Dasycladaceae algae Mastopora and Cyclocrinites were for the first time recorded from the Takche Formation (Upper Ordovician–lower Silurian), Parahio Valley, Spiti, India.
Ravi S. Chaubey, Olev Vinn, Birendra P. Singh, Om N. Bhargava, Subhay K. Prasad, Naval Kishore   +5 more
doaj   +1 more source