Results 51 to 60 of about 2,095 (187)

First record of ostracods from the Upper Ordovician red-coloured marine sandstones of the Tierekeawati Formation in Tarim Basin, NW China: implications on palaeoenvironment and palaeobiogeography

Journal of Palaeogeography, 2020
Ostracods are described for the first time from the red-coloured marine sandstones of Arisu section (Arisu red beds) of the Upper Ordovician Tierekeawati Formation in Kalpin area of northwestern Tarim Basin, Xinjiang Uygur Autonomous Region (Xinjiang ...
Jun-Jun Song, Yi-Xin Shen, Peng Tang, Xiao-Le Zhang, Qi-Jian Li, Zheng-Jiang Luo   +5 more
doaj   +1 more source

Lithofacies paleogeography of the Ordovician and its petroleum exploration potential in the Middle-Upper Yangtze Area, South China

Petroleum
Based on the drilling, logging and field analysis, this paper discusses the lithofacies paleogeography of the Ordovician and its petroleum potential in the Middle-Upper Yangtze Area, South China.
Wenzheng Li, Hua Jiang, Xiaodong Fu, Yuan He, Mingfeng Gu, Nan Su, Shiyu Ma, Shugen Liu, Yongxiao Wang, Xuefei Yang   +9 more
doaj   +1 more source

The Role of Regional and Local Structure in a Late Ordovician (Edenian) Foreland Platform-to-Basin Succession Inboard of the Taconic Orogen, Central Canada

Geosciences, 2013
The Upper Ordovician (Edenian) Lindsay Formation of the Ottawa Embayment represents the final stage of carbonate platform development in the Taconic foreland periphery inboard of the northern Appalachian orogen.
George R. Dix, Ruth Gbadeyan
doaj   +1 more source

Spatial and temporal evolution of a coastal erg margin: the Middle Jurassic Page Sandstone, southern Utah, USA

Sedimentology, EarlyView.
ABSTRACT Aeolian deflationary events are erosive to static stages where sediment supply is insufficient to support bedform migration and preservation in the rock record. In the vicinity of shallow‐marine environments, inland rises of relative water table and associated generation of deflationary super surfaces may be driven by the onset of ...
Victor J. P. Hême de Lacotte, Chester H. C. Davies, Briony J. Bowler, Stuart M. Clarke, Thomas J. H. Dodd   +4 more
wiley   +1 more source

Reservoir-forming conditions of platform margin belt in southern slope of Tazhong, Tarim Basin

Petroleum Exploration and Development, 2008
Based on the new seismic and logging data, this paper identifies the location and shape of the platform margin belt in Tazhong, Tarim Basin and studies its structural characteristics and reservoir-forming conditions using isochronous sequence framework ...
Zhi-qian GAO, Tai-liang FAN, Dian-bo LIU, Yao LI, Mei-li YU   +4 more
doaj   +1 more source

Darriwilian Saucrorthis Fauna: implications for the Great Ordovician Biodiversification Event (GOBE) [PDF]

Estonian Journal of Earth Sciences, 2014
The Saucrorthis Fauna is a brachiopod-dominated shelly fauna developed in relatively deeper-water benthic regimes of a few peri-Gondwana terranes (e.g.
Renbin Zhan, Xiaocong Luan, Bing Huang, Yan Liang, Guangxu Wang, Yi Wang   +5 more
doaj   +1 more source

Recognition of fossil keratose sponges in carbonates using petrographic and machine‐learning classification

Sedimentology, EarlyView.
ABSTRACT Filamentous, anastomosing spar‐filled networks in Phanerozoic carbonates have been interpreted as the mineralised remains of keratose (non‐spiculate) sponges, yet their recognition remains contested because fabrics of broadly similar appearance may arise from microbial, diagenetic or physical processes. This study combines direct fossil–modern
Jeong‐Hyun Lee, Seung‐Sep Kim, Cui Luo   +2 more
wiley   +1 more source

The Magnitude and Duration of Late Ordovician–Early Silurian Glaciation

Science, 2011
Carbonate isotopes reveal a link between past ocean temperatures and mass extinction.
Finnegan, Seth, Bergmann, Kristin, Eiler, John M., Jones, David S., Fike, David A., Eisenman, Ian, Hughes, Nigel C., Tripati, Aradhna K., Fischer, Woodward W.   +8 more
openaire   +3 more sources

Salt Range Formation of Pakistan Preserves Unique Record of Volcanic Fertilization During the Ediacaran Shuram Excursion

Terra Nova, EarlyView.
ABSTRACT Thin, discontinuous, organic‐rich oil shale beds in the siliciclastic‐evaporitic Salt Range Formation (SRF) of Pakistan are of approximate Neoproterozoic to Cambrian age based on stratigraphic constraints. The beds are enriched (26–43 wt.% total organic carbon, TOC) in aliphatic organic matter (OM) of low thermal maturity despite their ...
Paul C. Hackley, Ryan J. McAleer, Jay M. Thompson, Brett J. Valentine, Imran Khan   +4 more
wiley   +1 more source

New SHRIMP U-Pb data from the Famatina Complex: constraining Early–Mid Ordovician Famatinian magmatism in the Sierras Pampeanas, Argentina

Geologica Acta, 2009
New SHRIMP U-Pb zircon ages are reported for igneous and sedimentary rocks of the Famatina Complex, constraining the age of the magmatism and the ensialic basins.
J.A. DAHLQUIST, R.J. PANKHURST, C.W. RAPELA, C. GALINDO, P. ALASINO, C.M. FANNING, J. SAAVEDRA, E.G. BALDO   +7 more
doaj