Diagenesis and origin of porosity formation of Upper Ordovician carbonate reservoir in northwestern Tazhong condensate field
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Natural Gas Science and Engineering"
DOI: 10.1016/j.jngse.2016.12.008
Abstract: Abstract The Upper Ordovician Lianglitage Formation in Tazhong has been proven to be productive reef-shoal carbonate reservoirs, being of great significance for oil and gas exploration in Tarim Basin. Based on petrographic features, cathodeluminescence and… read more here.
Keywords: porosity; northwestern tazhong; upper ordovician; formation ... See more keywords
Symbiosis of conulariids with trepostome bryozoans in the Upper Ordovician of Estonia (Baltica)
Sign Up to like & getrecommendations! Published in 2019 at "Palaeogeography, Palaeoclimatology, Palaeoecology"
DOI: 10.1016/j.palaeo.2019.01.018
Abstract: Abstract The trepostome bryozoans Diplotrypa abnormis, D. bicornis, D. petropolitana, Esthoniopora communis, E. subsphaerica, Mesotrypa excentrica, M. expressa, M. raritabulata, and Monotrypa jewensis have symbiotic associations with the conulariid Climacoconus bottnicus in the Upper Ordovician… read more here.
Keywords: symbiosis; ordovician estonia; upper ordovician; trepostome bryozoans ... See more keywords
Genesis, modification, and preservation of complex Upper Ordovician hardgrounds: Implications for sequence stratigraphy and the Great Ordovician Biodiversification Event
Sign Up to like & getrecommendations! Published in 2019 at "Palaeogeography, Palaeoclimatology, Palaeoecology"
DOI: 10.1016/j.palaeo.2019.04.011
Abstract: Abstract Hardgrounds from the Upper Ordovician strata of eastern Laurentia exhibit a wide range of morphologies, though the development of their complex surface topographies remains poorly understood. These early lithified seafloors, which can be laterally… read more here.
Keywords: development; upper ordovician; biodiversification event; ordovician biodiversification ... See more keywords
New evidence for compaction-driven vertical fluid migration into the Upper Ordovician (Hirnantian) Guanyinqiao bed of south China
Sign Up to like & getrecommendations! Published in 2020 at "Palaeogeography, Palaeoclimatology, Palaeoecology"
DOI: 10.1016/j.palaeo.2020.109746
Abstract: Abstract The Late Ordovician was a time of major climatic and sea-level changes linked to the Hirnantian Glaciation, marked by large positive excursions of δ13Ccarb and δ13Corg globally known as the Hirnantian carbon isotopic excursion… read more here.
Keywords: south china; fluid migration; upper ordovician; guanyinqiao ... See more keywords
Early parasitic drilling in a rhynchonelliform brachiopod Rongatrypa xichuanensis from the Katian (Upper Ordovician) of central China
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Paleontology"
DOI: 10.1017/jpa.2019.102
Abstract: Abstract. An example of parasitic drilling in a rhynchonelliform brachiopod is described from the Shiyanhe Formation (Katian, Upper Ordovician) of Henan, central China. The boring extends into the shell almost perpendicular to the surface. The… read more here.
Keywords: drilling rhynchonelliform; parasitic drilling; upper ordovician; brachiopod ... See more keywords
The unusual atrypide brachiopod Qilianotryma suspectum (Popov, 1982) from the Upper Ordovician of the South China paleoplate
Sign Up to like & getrecommendations! Published in 2023 at "Journal of Paleontology"
DOI: 10.1017/jpa.2023.26
Abstract: The atrypide brachiopod Qilianotryma Xu in Jin et al., 1979 is an early member of the subfamily Spirigerininae initially described from the Katian (Upper Ordovician) Koumenzi Formation of the Qilian Mountains, Qaidam terrane, Northwest China.… read more here.
Keywords: china paleoplate; qilianotryma; atrypide brachiopod; south china ... See more keywords
Middle-Upper Ordovician conodonts from the Ffairfach and Golden Grove groups in South Wales, United Kingdom
Sign Up to like & getrecommendations! Published in 2021 at "Historical Biology"
DOI: 10.1080/08912963.2021.1929952
Abstract: ABSTRACT The conodont fauna of the reference succession of the regional British Llandeilian Stage of the Llanvirn Series was first described in a classical study by Rhodes more than 65 years ago using single element… read more here.
Keywords: middle upper; golden grove; ffairfach golden; upper ordovician ... See more keywords
New camerate crinoid genera from the Upper Ordovician (Katian) of Estonia: evolutionary origin of family Opsiocrinidae and a phylogenetic assessment of Ordovician Monobathrida
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Systematic Palaeontology"
DOI: 10.1080/14772019.2018.1447519
Abstract: Most major crinoid clades first appear in the fossil record during the Ordovician, but the evolutionary origins of many higher taxa remain unresolved. Here, the first camerate crinoids from the Katian (Upper Ordovician) of Estonia… read more here.
Keywords: estonia; upper ordovician; family; camerate ... See more keywords
Ostracods from the Delingde Formation (Upper Ordovician) of the Siberian Platform
Sign Up to like & getrecommendations! Published in 2019 at "Paleontological Journal"
DOI: 10.1134/s0031030119020072
Abstract: A rich ostracod assemblage consisting of 30 species from the Delingde Formation, Upper Ordovician of the Siberian platform, is studied for the first time. Thirteen new species of the genera Coelochilina, Retiprimites, Boreobolbina, Moierina, Leperditella,… read more here.
Keywords: delingde formation; ordovician siberian; formation upper; upper ordovician ... See more keywords
Upper Ordovician conodont biostratigraphy and revised lithostratigraphy and geological map, Akpatok Island, Ungava Bay, Nunavut
Sign Up to like & getrecommendations! Published in 2018 at "Canadian Journal of Earth Sciences"
DOI: 10.1139/cjes-2017-0145
Abstract: Stratigraphic units exposed on Akpatok Island, Ungava Bay, Nunavut, were previously recognized as Boas River and Akpatok formations; their biostratigraphic ages and correlations, in particular the stratigraphic position and age of the organic rich “Boas… read more here.
Keywords: island ungava; bay nunavut; bay; upper ordovician ... See more keywords
Effect of Hydrothermal Activity on Organic Matter Enrichment of Shale: A Case Study of the Upper Ordovician and the Lower Silurian in the Lower Yangtze, South China
Sign Up to like & getrecommendations! Published in 2018 at "Minerals"
DOI: 10.3390/min8110495
Abstract: The effect of organic matter on hydrocarbon potential, storage space, and gas content of shale is well-known. Additionally, present-day content of sedimentary organic matter in shale is controlled by depositional and preservation processes. Therefore, a… read more here.
Keywords: hydrothermal activity; matter; upper ordovician; organic matter ... See more keywords