Results 201 to 210 of about 2,124,047 (278)

Upper Ordovician bryozoans of Morocco

Geological Society, London, Special Publications, 2019
Abstract The majority of Upper Ordovician bryozoan occurrences in Morocco are known from the Anti-Atlas. These faunas are abundant and diverse; however, many of them still remain unstudied. The few explored bryozoan faunas of the Katian age exhibit high abundance and diversity of erect branched and massive trepostomes accompanied by few ...
A. Ernst
openaire   +2 more sources

Upper Ordovician Phacopida (Trilobita) from Tasmania

Alcheringa, 1999
Eastonian trilobite faunas of the Gordon Group in Tasmania include the new species Ceraurinella oepiki, Erratencrinurus trippi, and Pliomerina trisulcata, as well as a reedocalymeninid probably allied to Sarrabesia Hammann & Leone, 1997. Ceraurinella and Erratencrinurus have not previously been reported from Australia, the former being predominantly ...
Maxwell R Banks
exaly   +2 more sources

Carbon isotope (δ13Ccarb) stratigraphy of the Lower-Upper Ordovician of the Yangtze Platform, South China: Implications for global correlation and the Great Ordovician Biodiversification Event (GOBE)

Global and Planetary Change, 2021
We present new high-resolution carbonate carbon isotope data (δ13Ccarb) from four sections in the Yangtze Platform, South China, ranging in age from Tremadocian to early Katian.
D. Hu, Xiaolin Zhang, Menghan Li, Yilun Xu, Yanan Shen   +4 more
semanticscholar   +1 more source

Differential enrichment of shale gas in upper Ordovician and lower Silurian controlled by the plate tectonics of the Middle-Upper Yangtze, south China

, 2020
The Upper Ordovician Wufeng Formation and Lower Silurian Longmaxi Formation marine shale are the major shale gas exploration and development target in the Middle-Upper Yangtze region.
Zhiliang He, H. Nie, Li Shuangjian, Jun-Cheng Luo, Hu Wang, Guangrong Zhang   +5 more
semanticscholar   +1 more source

Factors controlling organic-matter accumulation in the Upper Ordovician-Lower Silurian organic-rich shale on the northeast margin of the Upper Yangtze platform: Evidence from petrographic and geochemical proxies

Marine and Petroleum Geology, 2020
Organic-rich shales are widespread in the Upper Ordovician-Lower Silurian Wufeng-Longmaxi Formations on the northeastern margin of the Upper Yangtze platform, and these shales have been recognized to be the hydrocarbon source rocks and shale gas ...
Fuhua Shang, Yanming Zhu, Q. Hu, Yang Wang, Yang Li, Wu Li, Ruiyin Liu, Haitao Gao   +7 more
semanticscholar   +1 more source

Cryptospores from the Katian (Upper Ordovician) of the Tungus basin: The first evidence for early land plants from the Siberian paleocontinent

Review of Palaeobotany and Palynology, 2016
Elena Raevskaya, Thomas Servais, Charles H Wellman   +2 more
exaly   +2 more sources

Biogenic silica and organic carbon fluxes provide evidence of enhanced marine productivity in the Upper Ordovician-Lower Silurian of South China

Palaeogeography, Palaeoclimatology, Palaeoecology, 2019
Biogenic silica is a powerful palaeoproductivity proxy in palaeomarine environments and is significant within shale gas reservoirs, demonstrating the association of marine hydrocarbon source rocks with the abundance of micro-siliceous fossils, yet ...
Maliha Zareen Khan, Q. Feng, Keming Zhang, Wei Guo   +3 more
semanticscholar   +1 more source

Differential Characteristics of the Upper Ordovician‐Lower Silurian Wufeng‐Longmaxi Shale Reservoir and its Implications for Exploration and Development of Shale Gas in/around the Sichuan Basin

Acta Geologica Sinica - English Edition, 2019
The Upper Ordovician Wufeng‐Lower Silurian Longmaxi shale is widely distributed in the Sichuan Basin and its periphery, which is the key stratum for marine shale gas exploration and development (E&D) in China.
Ruyue Wang, Zongquan Hu, Shengxiang Long, Guangxiang Liu, Jianhua Zhao, Li Dong, W. Du, Pengwei Wang, Shuai Yin   +8 more
semanticscholar   +1 more source

Mechanism analysis of organic matter enrichment in different sedimentary backgrounds: A case study of the Lower Cambrian and the Upper Ordovician-Lower Silurian, in Yangtze region

Marine and Petroleum Geology, 2019
In order to meet the demand of shale oil and gas exploration, it is more and more important to study the controlling effect of sedimentary environment on the enrichment of organic matter.
Kun Zhang, Yan Song, Shu Jiang, Zhenxue Jiang, C. Jia, Yizhou Huang, Ming Wen, Weiwei Liu, Xuelian Xie, Tianlin Liu, Pengfei Wang, Changan Shan, Yinghui Wu   +12 more
semanticscholar   +1 more source