Results 1 to 10 of about 4,994,993 (249)

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   +3 more sources

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, 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   +3 more sources

Strontium Isotope Stratigraphy: LOWESS Version 3: Best Fit to the Marine Sr‐Isotope Curve for 0–509 Ma and Accompanying Look‐up Table for Deriving Numerical Age [PDF]

Journal of Geology, 2001
An improved and updated version of the statistical LOWESS fit to the marine 87Sr/86Sr record and a revised look-up table (V3:10/99; available from j.mcarthur@ucl.ac.uk) based upon it enables straightforward conversion of 87Sr/86Sr to numerical age, and ...
Bailey, T.R., Howarth, R.J., McArthur, J.M.   +2 more
exaly   +2 more sources

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

Journal of Micropalaeontology, 2000
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,
Paul Dodsworth
openalex   +2 more sources

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

, 2013
Slah Boulila, Bruno Galbrun, Émilia Huret, Linda A. Hinnov, Isabelle Rouget, Silvia Gardin, Annachiara Bartolini   +6 more
openalex   +3 more sources

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

Geologie & Mijnbouw, 2011
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
openalex   +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, Soledad Ureta, Luis Carcavilla   +2 more
doaj   +1 more source

Long-term change of the eruption activities of Sakurajima volcano, Japan, inferred from the fallout tephra deposits

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, Ayumu Nishihara, Nobuo Geshi, Hideto Naruo   +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 Öland comprises Cambrian Series 2 and Miaolingian (Wuliuan Stage) siliciclastic strata.
Per Ahlberg, Frans Lundberg, Mikael Calner, Oliver Lehnert, Peter Dahlqvist, Michael M. Joachimski   +5 more
doaj   +1 more source