The Enigmatic Upper Ordovician of the Naturtejo UNESCO Global Geopark (Portugal) [PDF]
Geoconservation Research, 2021 Naturtejo UNESCO Global Geopark (Portugal) area includes deposits from the Neoproterozoic to the Quaternary. Despite its limited exposure area in major Variscan folded structures, the Ordovician series hosts some of its most famous geological heritage ...
Sofia Pereira +5 more
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Ordovician conodont diversity in the northern Baltic [PDF]
Estonian Journal of Earth Sciences, 2012 The diversity data presented in this paper are based on recently revised collections of conodonts from outcrops (northern Estonia) and core sections of Estonia and western and northern Latvia.
Peep Männik, Viive Viira
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δ13C chemostratigraphy in the upper Tremadocian through lower Katian (Ordovician) carbonate succession of the Siljan district, central Sweden [PDF]
Estonian Journal of Earth Sciences, 2014 Based on δ13C data from two drillcores recovered from the Siljan district, we present a first continuous carbon isotope record of the upper Tremadocian–lower Katian limestone succession of central Sweden.
Oliver Lehnert +4 more
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Niangziguan spring group in Shanxi Province and its water source
Carsologica Sinica, 2022 As a main natural discharge point of karst groundwater, Niangziguan spring group consists of 11 springs and is located in Niangziguan town, Yangquan City, Shanxi Province.
Chunlei TANG +8 more
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Paleomagnetism of Phanerozoic Geological Complexes in Tuva
Вестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле, 2020 The authors have investigated palaeomagnetically the Ordovician, Upper Devonian and Lower Carboniferous strata in Tuva. In the rocks, postfolding secondary and prefolding magnetization components were isolated.
Коваленко Д.В. +3 more
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On the Upper Ordovician unconformity in the Pyrenees: New evidence from the La Cerdanya area
Geologica Acta, 2007 In recent years, contradictory reports about whether or not an unconformity exists at the base of the Upper Ordovician succession of the Pyrenees have been made.
J.M. Casas, Ó. Fernández
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Reservoir forming conditions and exploration potential of Lower Paleozoic carbonate rocks in Gucheng area, Tarim Basin [PDF]
E3S Web of Conferences, 2021 The Gucheng region is oil and gas accumulation area of Tarim Basin，dominated by beach controlled lithologic oil and gas reservoirs，which has superior oil and gas accumulation conditions and broad exploration prospects.
Zheng Liu +4 more
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Lithosphere, 2022 Amalgamation of the Yangtze and Cathaysia blocks in the context of Gondwana assembly in the early Paleozoic has been addressed for decades, but the far-field effects on the Yangtze Block during the amalgamation remain unclear.
Hao Tang +8 more
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Subway into the Ordovician (Prague Basin, Czech Republic) [PDF]
Estonian Journal of Earth Sciences, 2023 In the Late Ordovician, the Prague Basin was located at the high-latitude northwestern shelf of Gondwana. This period was characterised by profound environmental changes and ended by one of the most severe mass extinctions, which was caused by climatic ...
Jana Bruthansová +2 more
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Lower Palaeozoic source rocks in Manjiaer Sag, Tarim Basin
Petroleum Exploration and Development, 2008 Considering its vertical distribution characteristics, this article argues that the Lower Palaeozoic source rock in the Manjieer Sag is composed of three sets of source rocks of Middle-Lower Cambrian, Middle-Lower Ordovician, and Upper Ordovician.
Meng-jun ZHAO +5 more
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