Results 31 to 40 of about 6,426 (198)

A new species of Lonchidiidae (Hybodontiformes) from the Late Jurassic of Brazil (Aliança Formation, Jatobá Basin)

The Anatomical Record, EarlyView.
Abstract The Aliança Formation (Jatobá Basin) represents lacustrine deposits formed in oxygenated waters that hosted a diverse fauna, including Hybodontiform sharks. Within this group, the Family Lonchidiidae comprises 11 valid genera, with Parvodus previously reported in Brazilian deposits from the Brejo Santo Formation (Araripe Basin, Late Jurassic ...
Larissa de Souza Ribeiro, Marco Aurélio Gallo de França   +1 more
wiley   +1 more source

NMR Evaluation of Shale Oil Mobility: Combined Pyrolysis and CO₂ Huff-N-Puff

Applied Sciences
The occurrence and mobility of shale oil are critical issues in exploration and development. Shale reservoirs exhibit a complex fluid state, with oil and water present in various forms.
Jianmeng Sun, Yibo Yao, Fujing Sun, Junlei Su, Jing Lu, Kun Liu, Peng Chi   +6 more
doaj   +1 more source

Geological Characteristics and Controlling Factors of Deep Shale Gas Enrichment of the Wufeng-Longmaxi Formation in the Southern Sichuan Basin, China

Lithosphere, 2022
To identify the factors controlling high-quality deep shale gas reservoirs and the exploration and development potential of the Lower Paleozoic marine shale in the Sichuan Basin, the sedimentary environment of deep shale was comprehensively analysed ...
Jing Li, Hu Li, Cheng Yang, Yijia Wu, Zhi Gao, Songlian Jiang   +5 more
doaj   +1 more source

Oldest well‐preserved euprimate petrosal, from the early Eocene of India (Vastan Lignite Mine, Gujarat)

The Anatomical Record, EarlyView.
Abstract An exquisitely preserved, isolated partial petrosal with associated fragmentary stapes is described from the Vastan Lignite Mine (Gujarat, India), dated to the early Eocene (~54.5 Ma). Several anatomical traits (e.g., large petrosal plate; posterolateral entry of the internal carotid artery to the tympanic cavity; bony tubes surrounding the ...
Mary T. Silcox, Kenneth D. Rose, Rachel H. Dunn, Kishor Kumar, Rajendra S. Rana, Ashok Sahni, Lachham Singh, Thierry Smith, Jordan W. Crowell   +8 more
wiley   +1 more source

Description of large, well‐preserved Enchodus specimens from the Bearpaw Formation of Alberta, Canada

The Anatomical Record, EarlyView.
Abstract Fishes of the genus Enchodus were abundant and cosmopolitan in the Late Cretaceous, but are primarily known from isolated remains in Canada. Four well‐preserved fish skulls were recovered in recent years from ammolite mines sampling the Bearpaw Formation of Southern Alberta, and are here referred to Enchodus petrosus Cope, 1874.
Luke E. Nelson, Alison M. Murray, Donald B. Brinkman   +2 more
wiley   +1 more source

Assessment of Chemical Effects on Wellbore Stability in Transition Shale Formation

Geofluids, 2022
Substantial research has been conducted on the mechanisms responsible for the wellbore collapse in shale formations. For chemically active soft shale formations, pore pressure and stress change due to osmotic pressure and hydration swelling are usually ...
Hai Lin, Jingen Deng, Chao Luo, Lin Li, Hailong Liu   +4 more
doaj   +1 more source

Pore characteristics and preservation mechanism of over-6000-m ultra-deep shale reservoir in the Sichuan Basin

Frontiers in Earth Science, 2023
Investigation of pore characteristics and their preservation mechanism of over 6000 m ultra-deep shale reservoirs is of significance for shale gas exploration and development in the Sichuan Basin.
Guoliang Xie, Guoliang Xie, Kun Jiao, Bin Deng, Weiduo Hao, Weiduo Hao, Shugen Liu, Shugen Liu   +7 more
doaj   +1 more source

Tooth histotype and enameloid microstructure of Priohybodus arambourgi d'Erasmo, 1960 (Elasmobranchii: Hybodontiformes) from the Late Jurassic of northeastern Brazil

The Anatomical Record, EarlyView.
Abstract Sharks possess varied diets and different prey capture mechanisms. As a result, the group exhibits a significant diversity in dental morphology, also reflecting the internal structures of the teeth. Internal dental anatomy points to the existence of three histotypes in elasmobranch phylogeny: orthodont, osteodont, and pseudoosteodont ...
Kelly Roberta da Silva, Valéria Gallo, Estevan Eltink   +2 more
wiley   +1 more source

Shale gas accumulation mechanism of deep-buried marine shale of Upper Ordovician Wufeng Formation to Lower Silurian Longmaxi Formation in the southeast Sichuan Basin

Petroleum Research
Deep shale gas has become an important frontier for future shale gas exploration and development. The Wufeng-Longmaxi formations in southern China have undergone complex tectonic and transformation through multi-stage tectonic movements.
Zhujiang Liu, Zhenxue Jiang, Fubin Wei, Tao Yuan, Fei Li   +4 more
doaj   +1 more source

Characteristics of lacustrine organic-rich shale: A case study of the Chang 7 member, Triassic Yanchang Formation, Ordos Basin, China

Journal of Natural Gas Geoscience, 2016
This paper presents a case study of lacustrine organic-rich shale from the Yanchang Formation, Ordos Basin, China. Sedimentary and geochemical analyses were performed on shale acquired from the Chang 7 member through its outcrop, core and thin section ...
Chuang Er, Yangyang Li, Jingzhou Zhao, Rui Wang, Zhikun Wei   +4 more
doaj   +1 more source