Results 31 to 40 of about 729 (158)

Reconstructing Environmental and Microbial Ecosystem Changes Across the Permian–Triassic Mass Extinction at Lusitaniadalen, Svalbard

Paleoceanography and Paleoclimatology, Volume 41, Issue 2, February 2026.
Abstract The Permian–Triassic environmental crisis triggered fundamental changes in marine ecosystems, culminating in the most severe biodiversity crisis of the Phanerozoic. Yet, the environmental and geochemical conditions governing the crisis and ecosystem recovery remain debated.
S. Z. Buchwald, A. B. Frank, D. Birgel, K. Senger, T. Mosociova, Y. Pei, B. Beaty, L. G. Tarhan, F. Galasso, M. A. Gómez Correa, S. E. Grasby, U. Struck, D. Yuan, R. Steinkrauss, J. Gliwa, N. Lahajnar, J. Peckmann, W. J. Foster   +17 more
wiley   +1 more source

Uppermost Albian biostratigraphy and chronostratigraphy

Carnets de Géologie, 2009
The Albian Stage is the highest chronostratigraphic unit of the Lower Cretaceous Series and underlies the Cenomanian Stage of the Upper Cretaceous Series.
Scott Robert W.
doaj  

Calcareous nannofossil and ammonite integrated biostratigraphy across the Jurassic – Cretaceous boundary strata of the Kopanitsa composite section (West Srednogorie Unit, southwest Bulgaria)

Geologica Carpathica, 2018
Calcareous nannofossil, calpionellid and ammonite occurrences have been directly constrained across the Jurassic–Cretaceous boundary interval in the section of Kopanitsa, SW Bulgaria.
Stoykova Kristalina, Idakieva Vyara, Ivanov Marin, Reháková Daniela   +3 more
doaj   +1 more source

Ichnological insights into deoxygenation across the Cenomanian–Turonian Boundary Oceanic Anoxic Event 2 in the northern extent of Western Interior Seaway (west‐central Alberta)

Sedimentology, Volume 73, Issue 2, Page 355-390, February 2026.
ABSTRACT In‐depth ichnological and sedimentological analyses of the Cenomanian–Turonian boundary Oceanic Anoxic Event (OAE2) from the Western Interior Seaway of west‐central Alberta reveal a persistent physico‐chemically stressed setting. The interval is characterised by a dominantly diminutive and diminished ichnological assemblage, with familiar ...
Sara K. Biddle, Murray K. Gingras
wiley   +1 more source

Guidebook for the post-congress fieldtrip in the Vocontian Basin, SE France (September 11-13, 2008).- 12th Meeting of the International Nannoplankton Association (Lyon, September 7-10, 2008)

Carnets de Géologie, 2008
• Chapter 1. The Aalenian-Bajocian (Middle Jurassic) of the Digne area • Chapter 2. The Global Boundary Stratotype Sections and Points (GSSP) of the Hauterivian: La Charce section (Drôme, France, Vocontian Basin) • Chapter 3.
Mattioli Emanuela, Gardin Silvia, Giraud Fabienne, Olivero Davide, Pittet Bernard, Reboulet Stéphane   +5 more
doaj  

Oxfordian and Kimmeridgian "Aspidoceras" in the Mediterranean. A methodological approach

Estudios Geologicos, 1987
En el presente trabajo se lleva a cabo un análisis contrastador de la Hipótesis Nula establecida como base metodológica para la investigación evolutiva de los"Aspidoceras" mediterráneos (Checa & Olóriz, 1985).
A. Checa, F. Olóriz
doaj   +1 more source

From Quarries to Urban Construction Sites: Middle‐Late Mesozoic Limestones in the Public Architecture of Roman Verona, Italy

Geoarchaeology, Volume 41, Issue 1, January/February 2026.
ABSTRACT Numerous buildings, monuments, and infrastructural works in Verona were constructed during the Roman period using stone, a material abundantly available from quarrying areas located relatively close to the city. Petrographic investigations conducted by Transmitted Polarized Light Optical Microscopy (TPL‐OM) and complemented by colorimetric ...
Eliana Bridi, Simone Dilaria, Jacopo Bonetto, Caterina Previato   +3 more
wiley   +1 more source

The Abiod at Ellès (Tunisia): stratigraphies, Campanian-Maastrichtian boundary, correlation [L'Abiod d'Ellès (Tunisie) : stratigraphies, limite Campanien-Maastrichtien et corrélation]

Carnets de Géologie, 2010
In central Tunisia near the village of Ellès is Wadi Ed Dam. There the Abiod Formation, underlain by the Kef marls and capped by the El Haria marls, crops out in an almost uninterrupted exposure about 286 m thick.
Robaszynski Francis, Mzoughi Moncef
doaj  

Some perisphinctoid ammonites of the Štramberk Limestone and their dating with associated microfossils (Tithonian to Lower Berriasian, Outer Western Carpathians, Czech Republic)

Geologica Carpathica, 2017
The present contribution deals with the taxonomy of seven species of perisphinctoid ammonite from the Štramberk Limestone (Outer Western Carpathians, Czech Republic) deposited in Moravian-Silesian museums.
Vašíček Zdeněk, Reháková Daniela, Skupien Petr   +2 more
doaj   +1 more source

Caenogastropods and heterobranch gastropods from the Hettangian deposits of Luxembourg: palaeobiogeography and Early Jurassic faunal recovery in the western Tethys

Papers in Palaeontology, Volume 12, Issue 1, January/February 2026.
Abstract We describe the Hettangian Caenogastropoda and Heterobranchia of the Luxembourg Sandstone Formation, a wedge of clastic sediments deposited along the eastern margin of Paris Basin during the Early Jurassic. Five new genera and 11 new species are erected: Bourguetia bipartita sp. nov., Globularia delsatei sp. nov., Oonia feidtorum sp.
Stefano Monari, Roberto Gatto, Mara Valentini, Robert Weis   +3 more
wiley   +1 more source