Results 11 to 20 of about 1,267 (203)
The first hominin from the early Pleistocene paleocave of Haasgat, South Africa [PDF]
PeerJ, 2016 Haasgat is a primate-rich fossil locality in the northeastern part of the Fossil Hominid Sites of South Africa UNESCO World Heritage Site. Here we report the first hominin identified from Haasgat, a partial maxillary molar (HGT 500), that was recovered ...
AB Leece +7 more
doaj +3 more sources
Energy Science & Engineering, 2019 Karstification in carbonate successions has an important influence on hydrocarbon accumulation. Taking the Ordos Basin, currently the largest petroliferous basin in China, as an example, this study examines the large‐scale, long‐term (~120 Myr ...
Di Xiao +6 more
doaj +2 more sources
Speleogenesis and depositional history of paleokarst phreatic caves/cavities; Podgrad, SW Slovenia
Acta Carsologica, 2021 The studied paleokarst corresponds to an uplifted peripheral foreland bulge when Upper Cretaceous diagenetically immature eogenetic carbonates were subaerially exposed, karstified and subsequently overlain by upper Paleocene/lower Eocene palustrine ...
Bojan Otoničar
doaj +1 more source
Upper Ordovician hardgrounds – from localized surfaces to global biogeochemical events [PDF]
Estonian Journal of Earth Sciences, 2023 Upper Ordovician hardgrounds display a spectrum of complexity reflecting a range of local to global-scale processes. Hardgrounds are cemented seafloor surfaces typically marked by the presence of encrusting taxa and borings.
Timothy R. Paton +4 more
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Petroleum Exploration and Development, 2021 Based on analysis of outcrop, drilling, logging and seismic data, and geotectonic background, the lithofacies paleogeography and paleokarst geomorphology of the Middle Permian Maokou Formation in the northwestern Sichuan Basin were reconstructed, and the
Yuan ZHONG +9 more
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Hydrological Processes, Volume 37, Issue 12, December 2023., 2023 The study's simulations reveal that sediment coverage has a significant impact on karst aquifer drainage. A thin layer of highly permeable sediments can considerably reduce conduit outlet discharge, while an impervious sediment cover can completely block the outlet, potentially leading to the emergence of new conduits and springs.
Marc Ohmer +2 more
wiley +1 more source
Research progress of paleokarst oil and gas reservoirs
Carsologica Sinica, 2022 The transformation of soluble rocks by paleokarst can form dissolution pores and other reservoir spaces. Especially for carbonate rocks, the development of paleokarst can greatly improve the reservoir performance of the formation and form karst ...
Yu ZHANG +3 more
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The Anatomical Record, Volume 306, Issue 11, Page 2693-2715, November 2023., 2023 Abstract A new Old World trident bat (Rhinonycteridae) is described from an early Miocene cave deposit in the Riversleigh World Heritage Area, northwestern Queensland, Australia. Living rhinonycterids comprise a small family of insect‐eating, nasal‐emitting rhinolophoid bats from Africa, Madagascar, Seychelles, the Middle East, and northern Australia ...
Suzanne J. Hand +3 more
wiley +1 more source
Microgravity Monitoring in Fractured‐Vuggy Carbonate Reservoirs
Geofluids, Volume 2023, Issue 1, 2023., 2023 With the development of Tahe Oilfield entering the high water cut stage, gas channeling occurs in fractured‐vuggy system during nitrogen injection, resulting in some inefficient wells. To improve the development effect of gas flooding, how to define the distribution of fracture, vuggy, and remaining oil has become one of the urgent problems to be ...
Chunhui Du +5 more
wiley +1 more source
Geofluids, Volume 2023, Issue 1, 2023., 2023 In the Yan’an gas field, southeast of Ordos Basin, the discovered natural gas reserves are 114 billion cubic meters. Highly productive gas reservoirs were formed in paleokarst. By using 164 samples from 27cores, the geochemical study of diagenetic evolution was carried out, and the relationship between different diagenesis environments was discussed by
Haiyan Wu +10 more
wiley +1 more source