Results 21 to 30 of about 430 (178)

Sections comparison of the Sigov Formation of the Ust-Yenisey and Turukhan-Eloguy regions of the Tazo-Kheta structural-facies area [PDF]

open access: yesНефтегазовая геология: Теория и практика, 2021
The article deals with issues of identification of the Sigov Formation (Upper Jurassic) within the Tazo-Kheta structural-facies area (northeastern Arctic region of Western Siberia).
Borisov E.V.
doaj   +1 more source

The Standard Auxiliary Boundary Stratotype: a proposed replacement for the Auxiliary Stratotype Point in supporting a Global boundary Stratotype Section and Point (GSSP)

open access: yesEpisodes, 2023
Auxiliary boundary stratotypes have unquestionable value in extending the knowledge of a Global boundary Stratotype Section and Point (GSSP) between continents, biogeographic provinces, climatic zones, depositional facies and preservational states. Two kinds of such stratotypes are in use, the Auxiliary Stratotype Point and the Auxiliary Stratotype ...
Head, Martin J.   +3 more
openaire   +2 more sources

MEASURED SECTION FOR THE POSSIBLE STRATOTYPE OF THE MIRI FORMATION, AT MIRI HILL, NORTH SARAWAK, MALAYSIA [PDF]

open access: yesGeological Behavior, 2018
The Miri Formation is continuously studied by many researchers in various aspects and disciplines in geology due to the important petroleum reservoir since the period of production in 1920-1941.
Muhd Nur Ismail Abdul Rahman   +1 more
doaj   +1 more source

The early Katian (Late Ordovician) reefs near Saku, northern Estonia and the age of the Saku Member, Vasalemma Formation [PDF]

open access: yesEstonian Journal of Earth Sciences, 2014
Reefs developed simultaneously during the latest Sandbian/earliest Katian global Guttenberg Isotopic Carbon Excursion (GICE) in several places across Baltoscandia.
Björn Kröger   +4 more
doaj   +1 more source

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

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

Fossil freshwater fishes from the Pliocene of northern Colombia and the palaeogeography of northern South America

open access: yesPapers in Palaeontology, Volume 12, Issue 4, July/August 2026.
Abstract Freshwater fishes from the northwestern Colombian Andes are reported from the Pliocene Sincelejo and Ware formations. A total of 10 taxa have been identified, involving two orders, five families and nine genera. Characters from dental morphology, fin spines and cranial bones are provided as taxonomic tools for the study of fossil fishes.
Gustavo A. Ballen   +6 more
wiley   +1 more source

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

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

open access: yesGeochemistry, 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   +7 more
wiley   +1 more source

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