Results 31 to 40 of about 2,815 (172)

Ostracods and conodonts of the Ustyarega Formation of the stratotype area (Lower Frasnian, Southern Timan) [PDF]

open access: yesНефтегазовая геология: Теория и практика, 2022
New data on ostracods and conodonts and their stratigraphic distribution in the Ustyarega Formation of a stratotype area (Lower Frasnian, Southern Timan) are presented.
Sobolev D.B.   +2 more
doaj   +1 more source

Lower miocene stratigraphy of the Eastern Paratethys: Problems and state of the art [PDF]

open access: yesGeološki Anali Balkanskoga Poluostrva
The Lower Miocene regional stages of the Eastern Paratethys, the Caucasian, Sakaraulian, and Kozakhurian, have been recognized in different structural facies zones of the basin and have no reliable universal stratigraphic basis for defining their ...
Golovina Larisa   +5 more
doaj   +1 more source

Evaluation of the Rb/Sr ratio as an indicator of chemical weathering: a case study from five sedimentary sections in Northeast China

open access: yesBoreas, EarlyView.
Chemical weathering plays a pivotal role in the Earth's surface material cycle and global climate regulation. It not only facilitates the reconstruction of palaeoclimate characteristics but also provides essential insights into Earth's evolutionary history.
Zhenyu Wei   +9 more
wiley   +1 more source

THE PROTECTION OF JURASSIC SITES AND FOSSILS: CHALLENGES FOR GLOBAL JURASSIC SCIENCE (INCLUDING A PROPOSED STATEMENT ON THE CONSERVATION OF PALAEONTOLOGICAL HERITAGE AND STRATOTYPES)

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2004
Effective geoconservation systems are crucial to the activities of subcommissions of the International Subcommission on Stratigraphy, such as the Jurassic Subcommission (ISJS).
KEVIN N. PAGE
doaj   +1 more source

Science or Strategy? The Rejection of the Anthropocene Epoch Demands Transparency

open access: yesEarth's Future, Volume 14, Issue 10, October 2026.
Abstract In a recent Earth's Future article, Skelton and Noone (2025, https://doi.org/10.1029/2024ef005719) crystallized the dilemma facing the geoscientific community: the Anthropocene Working Group's (AWG) evidentiary case for an Anthropocene epoch is at least as strong as, and in their view stronger than, that for the Holocene.
Georg N. Schäfer   +3 more
wiley   +1 more source

Le Gargasien (Aptien moyen) de Cassis-La Bédoule (stratotype historique de l'Aptien inférieur, SE France) : localisation géographique et corrélations stratigraphiques

open access: yesCarnets de Géologie, 2004
Dans le stratotype historique du sous-étage inférieur de l'Aptien (Bédoulien), les couches gargasiennes sus-jacentes affleuraient encore largement au milieu du siècle dernier, au niveau de nombreuses carrières s'étendant selon une bande orientée NNE-SSW,
Renard Maurice   +4 more
doaj  

Life After Impact: Paleobathymetric Gradients in Post‐K/Pg Nannoplankton Boom‐Bust Successions

open access: yesPaleoceanography and Paleoclimatology, Volume 41, Issue 10, October 2026.
Abstract The Cretaceous/Paleogene (K/Pg) bolide impact ∼66 Ma caused the near‐demise of calcareous nannoplankton–key primary producers and major components of the biological pump that exports organic and inorganic carbon to the deep sea. Despite their ecological significance, resolving the exact impact of nannoplankton's mass extinction on ecosystem ...
Heather L. Jones   +11 more
wiley   +1 more source

Revision of the loess stratotype of Kesselt (Limbourg, Belgium) [PDF]

open access: yes, 1996
peer reviewedFor forty years, the section of Kesselt has been considered as the Weichselian stratotype of eastern Middle Belgium. The recent advance of the quarry displays, interbedded at mid-height of the section, an interglacial paleosol overlain by a ...
Juvigné, Etienne   +8 more
core  

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

open access: yesНефтегазовая 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.   +5 more
doaj  

EVOLUTION OF THE PSEUDOSTAFFELLIDAE IN THE BASHKIRIAN(MIDDLE CARBONIFEROUS)

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2003
The origin and evolution of the family Pseudostaffellidae is discussed, based on the study of foraminifers from the stratotype and reference sections of the Bashkirian stage of the Southern Urals.
ELENA I. KULAGINA, ZINAIDA A. SINITSYNA
doaj   +1 more source

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