Results 41 to 50 of about 2,786 (210)

Stratotypical sections of the Upper Ordovician Khoreyver basin (Timan-Pechora region) [PDF]

Нефтегазовая геология: Теория и практика
Descriptions of stratotypic and hypostratotypic sections of the Upper Ordovician of the Khoreyver Basin are given. The stratotypes of the Malomakarikha, Bagan and Muker Formations were established in the section of the Zapadno-Makariha (Srednemakarikha ...
Shamsutdinova L.L., Nikiforova L.V., Dmitrieva T.V., Sokiran E.V., Myasnikova M.A., Tolmacheva T.Yu.   +5 more
doaj  

Minimal Perturbation of the Global Mercury Cycle by the Paraná–Etendeka Large Igneous Province (PE–LIP) During the Onset of the Valanginian Weissert Event

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 7, July 2026.
Abstract The Valanginian positive carbon isotope excursion (Weissert Event, ca. 135 million years ago) documents a major global carbon cycle and climate perturbation. Radioisotopic dating suggests that this event was broadly contemporaneous with an interval of profoundly enhanced volcanic activity during the emplacement of the Paraná–Etendeka Large ...
K. Krishnaswamy, J. Frieling, L. M. E. Percival, K. Littler, S. Reboulet, I. M. Fendley, T. A. Mather, S. A. Robinson   +7 more
wiley   +1 more source

Characterisation of the organic matter of upper Bedoulian and lower Gargasian strata in the historical stratotypes (Apt and Cassis-la-Bédoule areas, SE France)

Carnets de Géologie, 2008
The Total Organic Carbon (TOC) content of the Gargasian strata studied in their historical stratotype area is rather low (0.3% on average). Only a few levels show TOC values approaching 1.2%. This small amount of preserved organic matter, associated with
Tronchetti Guy, Moullade Michel, Baudin François   +2 more
doaj  

Search for impact ejecta at the Paleocene–Eocene boundary

Meteoritics &Planetary Science, Volume 61, Issue 7, Page 1585-1592, July 2026.
Abstract Almost 10 years have passed since microtektites and microkrystites were reported for the Paleocene–Eocene (P–E) boundary in drill cores and outcrop in New Jersey and in ODP Hole 1051B in the western North Atlantic. The glassy spherules were interpreted to reflect an impact trigger for the Paleocene–Eocene Thermal Maximum (PETM).
Birger Schmitz, Yue Cai, Shiyong Liao, Victoriano Pujalte, Ting Ruan, Robert P. Speijer, Ellen Thomas   +6 more
wiley   +1 more source

Nouvelles études micropaléontologiques sur le stratotype de la limite Campanien-Maastrichtien à Tercis (SO France) : compléments sur les ostracodes extraits par acétolyse

Carnets de Géologie, 2008
Une nouvelle étude de la microfaune, obtenue par acétolyse des niveaux indurés dans le Campanien-Maastrichtien de la carrière de Tercis, a permis de récolter 22 espèces additionnelles au regard de l'étude publiée en 2001 et de porter ainsi à 75 espèces ...
Andreu Bernard, Odin Gilles Serge
doaj  

Quantification of the Eocene–Oligocene transition in the Zagros Foreland Basin: Palaeogeographic control on sequence architecture and tectonic signal preservation

The Depositional Record, Volume 12, Issue 3, June 2026.
New bio‐sequence framework for the Eocene–Oligocene transition in Zagros. Geochemical data validate basin depth control on SB1 vs. SB2 boundaries. SEM‐EDS analyses confirm subaerial exposure versus continuous deposition. Sensitivity analysis quantifies sub‐10% uncertainty in stratigraphic interpretations. Resolves the Pyrenean orogeny's variable impact
Sahar Rokni, Vahid Ahmadi, Seyed Hamid Vaziri, Ali Aghanabati, Pooria Kianoush   +4 more
wiley   +1 more source

Stratotypes of local stratigraphic units of the Lower Silurian of the Bolshezemelsk area (Timan-Pechora region) [PDF]

Нефтегазовая геология: Теория и практика
Descriptions of the local stratotypes of the Lower Silurian Formations of the Bolshezemelsk area of the Timan-Pechora region are provided and their geological and geophysical sections are presented.
Shamsutdinova L.L., Nikiforova L.V., Dmitrieva T.V., Sokiran E.V.   +3 more
doaj  

Loess Studies in Aotearoa New Zealand

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.
Loess in Aotearoa New Zealand (ANZ) has been studied since its first documented recognition (on Banks Peninsula) in 1878 by Julius von Haast. A decade later, John Hardcastle revealed that southern ANZ loess was both glacial in origin and contained signals of past climates.
Brent V. Alloway, David J. Lowe, Bradley J. Pillans, Peter C. Almond, Alan S. Palmer   +4 more
wiley   +1 more source

New micropalaeontological studies on the type section of the Campanian-Maastrichtian at Tercis (SW France): new ostracodes obtained using acetolysis

Carnets de Géologie, 2008
Through the use of acetolysis new micropalaeontological studies on the type section of the Campanian-Maastrichtian boundary at Tercis (SW France) we obtained additional information on ostracodes.
Odin Gilles Serge, Andreu Bernard
doaj  

Les Bivalves et Gastéropodes du stratotype historique de l'Aptien inférieur dans la région de Cassis-La Bédoule (SE France)

, 1998
Masse Jean-Pierre. Les Bivalves et Gastéropodes du stratotype historique de l'Aptien inférieur dans la région de Cassis-La Bédoule (SE France). In: Géologie Méditerranéenne. Tome 25, numéro 3-4, 1998.
Masse, Jean-Pierre
core   +1 more source