Results 1 to 10 of about 4,727,270 (365)

Sequence stratigraphy and lithofacies paleogeographic evolution of Katian Stage – Aeronian Stage in southern Sichuan Basin, SW China

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, Gengsheng CHEN, Yong LIU, Xuewen SHI, Wei WU, Chao LUO, Xue YANG, Yuran YANG, Yuanhong ZOU   +8 more
doaj   +5 more sources

Stage boundaries, global stratigraphy, and the time scale: towards a simplification [PDF]

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, Robaszynski Francis, Gardin Silvia, Odin Gilles Serge   +3 more
doaj   +6 more sources

STRATIGRAPHY AND FUSULINIDS OF THE MOSCOVIAN STAGE (MIDDLE CARBONIFEROUS) IN THE SOUTHWESTERN DARVAZ (PAMIR)

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   +5 more sources

Belemnite-based strontium, carbon and oxygen isotope stratigraphy of the type area of the Maastrichtian Stage [PDF]

Netherlands Journal of Geosciences - Geologie en Mijnbouw, 2011
AbstractBelemnitellid cephalopods from the Maastrichtian stratotype area (southeast Netherlands) are shown to be comparatively well preserved. Although partial diagenetic alteration has been observed, micromilling techniques have permitted the extraction of pristine belemnite calcite, suitable for the reconstruction of strontium (Sr), oxygen (O) and ...
Hubert Vonhof, John W.M. Jagt, Adrian Immenhauser, Jan Smit, Yascha W. van den Berg, Margot Saher, Norbert Keutgen, John J. G. Reijmer   +7 more
semanticscholar   +7 more sources

Astronomical calibration of the Toarcian Stage: Implications for sequence stratigraphy and duration of the early Toarcian OAE [PDF]

Earth and Planetary Science Letters, 2013
The Toarcian Oceanic Anoxic Event (T-OAE) of the early Jurassic period involves one of the largest perturbations of the carbon cycle in the past 250 Ma, recorded by a pronounced negative carbon-isotope excursion (CIE). Numerous studies have focused on potential causes of the T-OAE and CIE, but are hampered by an uncertain timescale.
Slah Boulila, Bruno Galbrun, Émilia Huret, Linda A. Hinnov, Isabelle Rouget, Silvia Gardin, Annachiara Bartolini   +6 more
semanticscholar   +6 more sources

Trans-Atlantic dinoflagellate cyst stratigraphy across the Cenomanian–Turonian (Cretaceous) Stage boundary [PDF]

Journal of Micropalaeontology, 2000
Abstract. The principal palynological proxy for the Cenomanian–Turonian Stage boundary, the top of consistent/common Litosphaeridium siphoniphorum (a dinoflagellate cyst), occurs in Greenhorn Bed 73 at the international stratotype section, west of Pueblo, Colorado, USA.
Paul Dodsworth
semanticscholar   +6 more sources

Foraminiferal stratigraphy of raised marine deposits, representing isotope stage 5, Prins Karls Forland, western Svalbard [PDF]

Polar Research, 1998
Two raised marine sequences from Prins Karls Forland, western Svalbard, interpreted to have been deposited during part of isotope substage 5e (Eemian) and substage 5a, were studied for foraminifera content. Time constraints are given by 14C ages, infrared stimulated luminescence age estimates and amino acid ratios in subfossil marine molluscs.
Helene Bergsten, T.I. Hauge Andersson, Ólafur Inǵólfsson   +2 more
semanticscholar   +6 more sources

Progress, Problems and Prospects on the Stratigraphy and Correlation of the Kungurian Stage, Early Permian (Cisuralian) Series [PDF]

Acta Geologica Sinica - English Edition, 2011
Abstract:The Kungurian Stage is one of the three remaining stages of the Permian that is not yet defined at the base by a Global Stratotype Section and Point (GSSP). The candidate section at the Yuryuzan' River in the Urals yields few conodonts, and contains non‐marine sediments near the boundary. The search for a suitable, continuous marine succession
Yue Wang, Jing Wang, Jun Chen, Weijie Wang, Shu‐zhong Shen, Charles M. Henderson   +5 more
openalex   +3 more sources

The relationship between the loess stratigraphy in the Vojvodina region of northern Serbia and the Saalian and Rissian Stage glaciations – a review [PDF]

Boreas
The regional loess stratigraphy in the Vojvodina region, in the southeastern Carpathian Basin, has often been successfully correlated to the global palaeoclimate. This is a quasi‐continuous sedimentary record that provides detailed environmental reconstruction during the last four glacial/interglacial cycles.
Slobodan B. Marković, Philip D. Hughes, Randall J. Schaetzl, Philip L. Gibbard, Qingzhen Hao, Milica G. Radaković, Jef Vandenberghe, Igor Obreht, György Sípos, Christian Laag, Milivoj B. Gavrilov, Aleksandar Antić, Rastko S. Marković, Petar Krsmanović, Kaja Fenn, Tin Lukić, Zoran M. Perić   +16 more
openalex   +6 more sources

Sequence stratigraphy of the Upper Miocene Stage IVC in the Labuan-Paisley Syncline, northwest Sabah Basin [PDF]

Bulletin of the Geological Society of Malaysia, 1997
A sequence stratigraphic study of the Upper Miocene Stage IVe has been carried out in the Labuan-Paisley Syncline, Northwest Sabah Basin with the aim of identifying new hydrocarbon plays in the study area. The Stage IVe contains up to 4,000 m thick, clastic sediments deposited in coastal plain to bathyal environments probably between 8.2 Ma and 10.5 Ma
Robert Wong
openalex   +2 more sources