Results 81 to 90 of about 1,794 (218)

Revision of Sagenopteris (Caytoniales): a major lineage of the Mesozoic seed plants

Papers in Palaeontology, Volume 10, Issue 6, November/December 2024.
Abstract Sagenopteris is the most common fossil organ attributed to Caytoniales and is represented by compound leaves having several (usually four) lanceolate leaflets in pseudo‐palmate arrangement. Since Presl's description of Sagenopteris in 1838, at least 82 species have been identified worldwide.
Yuanyuan Xu, Maria Barbacka, Paweł Kapusta, Agata Jarzynka, Yongdong Wang, Stephen McLoughlin   +5 more
wiley   +1 more source

Paleogene monsoons across India and South China: Drivers of biotic change [PDF]

, 2017
Monsoonal climates at low latitudes (2. Fossil leaf form reveals that under such 'hothouse' conditions megathermal early Eocene to earliest Miocene forests were exposed to strong monsoonal climates typical of those experienced today arising from annual ...
Aleksandrova, Galina, Ding, Lin, Herman, Alexei, Jin, Jian-Hua, Kodrul, Tatiana, Liu, Xiao-Yan, Maslova, Natalia, Mehrotra, Rakesh, Shukla, Anumeha, Spicer, Robert, Spicer, Teresa, Srivastava, Gaurav, Xu, Qiang, Yang, Jian   +13 more
core   +1 more source

Provenance and the U–Pb age constraints on the tuff beds of the Late Jurassic–Early Cretaceous Bazhenovo Formation, West Siberian Basin

The Depositional Record, Volume 10, Issue 2, Page 312-334, April 2024.
Report on the geochemistry and geochronology of the tuff beds from the Bazhenovo black shales, West Siberian Basin. Geochemical discrimination indicates an affinity with volcanic arc basalts. New constraints on the J–K boundary in the Boreal Realm using high‐precision U–Pb data.
Timur Bulatov, Yakov Yermakov, Anna Kulikova, Bulat Gareev, Mikhail Spasennykh   +4 more
wiley   +1 more source

Petrographic Controls on Pore and Fissure Characteristics of Coals from the Southern Junggar Coalfield, Northwest China

Energies, 2018
The productive potential of coalbed methane projects is controlled by pore and fissure characteristics, which are intrinsically related to coal petrology. This work attempts to identify the influence of petrographic factors on the development of pore and
Sandong Zhou, Dameng Liu, Yidong Cai, Zuleima Karpyn, Yanbin Yao   +4 more
doaj   +1 more source

Summary of potential oil and gas formations in England for use in groundwater vulnerability assessments [PDF]

, 2016
The joint Environment Agency (EA) and BGS project “3D Groundwater Vulnerability” (3DGWV) will develop a methodology for attributing vulnerability of groundwater to pollution from sub-surface oil and gas exploration and production activities, including ...
Loveless, S., Smith, N.
core  

Mechanism and control of strong rock pressure in the gully area under compound key strata

Energy Science &Engineering, Volume 12, Issue 4, Page 1745-1758, April 2024.
In view of the problem strong rock pressure is easy to occur in coal seam mining in western gully terrain. Through similar simulation, theoretical calculation and analysis, numerical simulation and field measurement, the mechanism of strong rock pressure in the gully area was analyzed.
Xingping Lai, Haoyu Zhu, Pengfei Shan, Yun Zhang, Longquan Wu, Hao Qiao, Haozhou Zhao, Ziqiang Dai   +7 more
wiley   +1 more source

Evidence for coal forest refugia in the seasonally dry Pennsylvanian tropical lowlands of the Illinois Basin, USA [PDF]

, 2014
The Moscovian plant macroflora at Cottage Grove southeastern Illinois, USA, is a key example of Pennsylvanian (323–299 Million years ago) dryland vegetation.
Balme, Bashforth, Bashforth, Burnham, Campbell, Chaloner, DiMichele, DiMichele, Dimitrova, Dimitrova, Dolby, Eble, Eros, Falcon-Lang, Falcon-Lang, Falcon-Lang, Farley, Feldman, Gastaldo, Gastaldo, Gastaldo, Gastaldo, Greenwood, Havinga, Hofmann, Jackson, Lyons, Mahaffy, Mander, Mander, McElwain, Pfefferkorn, Prentice, Ravn, Ravn, Scheihing, Smith, Spicer, Stewart, Sugita, Van Hoof, Willard   +41 more
core   +4 more sources

Stratigraphy, palaeogeography and evolution of the lower Nanaimo Group (Cretaceous), Georgia Basin, Canada

Basin Research, Volume 36, Issue 1, January–February 2024.
The siliciclastic lower Nanaimo Group records the initiation and depositional evolution of a forearc basin (Georgia Basin, Canada). Our research revises the traditional lithostratigraphic framework and proposes a new stratigraphic framework for the lower Nanaimo Group.
Kristian Girotto, Shahin E. Dashtgard, Chuqiao Huang, James A. MacEachern, H. Daniel Gibson, Gwyneth Cathyl‐Huhn   +5 more
wiley   +1 more source

Logging identification of karstified Jurassic conglomerate aquifer in the Zhuxianzhuang coal mine: implications for water abundance heterogeneity and mining risk mitigation

Frontiers in Earth Science
The Jurassic conglomerate aquifer in the coal seam roof of Zhuxianzhuang Coal Mine in the Huaibei Coalfield exhibits significant karst and water-rich heterogeneity, and its geological patterns remain poorly understood.
Zhu Guanyu, Zhu Guanyu, Jiang Bo, Jiang Bo, Li Ming, Li Ming, Song Yu, Song Yu, Cheng Guoxi, Cheng Guoxi   +9 more
doaj   +1 more source

Yorkshire geology as seen through the eyes of notable British Geological Survey geologists 1862-2000 [PDF]

, 2015
This paper was presented at the PLACE (People, Landscape & Cultural Environment Education and Research Centre) conference 3rd October 2015. It describes some of the major contributions made to the understanding of Yorkshire geology by geologists of the ...
Cooper, Anthony H.
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