Results 1 to 10 of about 3,017 (160)
Stage boundaries, global stratigraphy, and the time scale: towards a simplification
Carnets de Géologie, 2004 This paper examines four facets of stratigraphic terminology and usage considered faulty and proposes corrective measures. The four perfectible areas are: (1) The system of dual nomenclature requiring discrete terminologies for the superpositional and ...
Thierry Jacques +3 more
doaj +5 more sources
Petroleum Exploration and Development, 2021 Based on the lithologies, sedimentary structures, graptolite zones, inorganic geochemical characteristics, electrical data of 110 shale gas wells in southern Sichuan Basin and the mineral quantitative analysis technology of scanning electron microscope ...
Yiqing ZHU +8 more
doaj +2 more sources
Rivista Italiana di Paleontologia e Stratigrafia, 1998 A refined subdivision, based on fusulinids, of the Moscovian stage in southwestern Darvaz is proposed. Seven local zones, three in the Lower Moscovian substage and four in the Upper Moscovian substage were established, based on investigations of three ...
ERNST JA. LEVEN
doaj +2 more sources
Establishing the Lower-Middle Jurassic Boundary in the UNESCO Global Geopark Molina & Alto Tajo (Central Spain) [PDF]
Geoconservation Research, 2021 The Global Boundary Stratotype Section and Point (GSSP) of the Aalenian Stage (base of the Middle Jurassic), was established in Fuentelsaz (Central Spain) by the International Commission on Stratigraphy (ICS) of the International Union of Geological ...
Antonio Goy +2 more
doaj +1 more source
Frontiers in Earth Science, 2022 Stratigraphic analysis of fallout tephra deposits in and around a volcano provides a framework for understanding the long-term temporal change in the volcano’s activities.
Ayumu Nishihara +3 more
doaj +1 more source
Miaolingian (Cambrian) trilobite biostratigraphy and carbon isotope chemostratigraphy in the Tingskullen drill core, Öland, Sweden [PDF]
Estonian Journal of Earth Sciences, 2021 The Cambrian succession of the Tingskullen drill core from northern Ãland comprises Cambrian Series 2 and Miaolingian (Wuliuan Stage) siliciclastic strata.
Per Ahlberg +5 more
doaj +1 more source
Palaeoclimate evolution and sequence stratigraphy during Pliocene Shizigou stage, Qaidam Basin
Shiyou shiyan dizhi, 2020 The Qaidam Basin is a large transpressional Mesozoic to Cenozoic basin in the Tibet Plateau, West China. Since the Indosinian Movement, it has been in the subsidence stage and more than 3 trillion cubic meters of natural gas accumulated at the same time.
Qingshan LI +3 more
doaj +1 more source
Quaternary stratigraphic regionalization and comprehensive framework in Nanling and adjacent areas
地质科技通报, 2021 The Quaternary sediments in the Nanling and adjacent areas are dominated by alluvial, eluvium and cave deposits, which have lacked of a unified stratigraphic and chronological framework.Based on the results of field survey and research on profiles, the ...
Yuanrun Shi +4 more
doaj +1 more source
The Salittu Formation in southwestern Finland, part I: Structure, age and stratigraphy [PDF]
Bulletin of the Geological Society of Finland, 2016 Because of the relatively low metamorphic grade, low strain and well-preserved early structures in volcanic and volcaniclastic rocks, the Orijärvi triangle (in the center of the larger Orijärvi area) is one of the few locations in the Svecofennian orogen
M. Nironen, I. Mänttäri, M. Väisänen
doaj +1 more source
The Depositional Record, 2022 Sea‐level fall is commonly inferred to generate a sharp‐based shoreface succession that displays an abrupt vertical transition from heterolithic, lower shoreface to sandy, upper shoreface deposits across a marine erosion surface.
Brian J. Willis +2 more
doaj +1 more source