Results 21 to 30 of about 8,625 (202)

Сonodonts from the boundary Artinskian-Kungurian deposits of Mechetlino section (Bashkortostan, the South Urals). Article II. Stratigrafic distribution of conodonts

open access: yesЛитосфера, 2018
The images of the species of conodonts from the section of boundary Artinskian-Kungurian deposits on by right to coast Yuryuzan River near the village Mechetlino are given and commented.
Valerii V. Chernykh
doaj   +1 more source

Microfossils from Middle Triassic beds near Mišji Dol, central Slovenia

open access: yesGeologija, 2023
Middle Triassic beds exposed along the road between Mišji Dol and Poljane pri Primskovem (Posavje Hills) comprise marlstone, tuff, volcaniclastic sandstone, and thin- to medium-bedded limestone and dolostone.
Katja Oselj   +3 more
doaj   +1 more source

Towards a revised Sandbian conodont biozonation of Baltica [PDF]

open access: yesEstonian Journal of Earth Sciences, 2023
One of the key objectives of the studies proposed by the Ordovician Subcommission is the improvement of regional stratigraphy for further advancements in global correlation.
Tõnn Paiste   +3 more
doaj   +1 more source

The Evae transgression: a major event? [PDF]

open access: yesEstonian Journal of Earth Sciences, 2023
The most extensive sea-level event of the Early Ordovician is known as the Evae transgression. During the highstand of this event, the conodont index species Oepikodus evae reached its acme and often coincided with the peak in conodont generic diversity.
Gisella M. Della Costa   +1 more
doaj   +1 more source

Upper Ordovician chronostratigraphic correlation between the Appalachian and Midcontinent basins [PDF]

open access: yesEstonian Journal of Earth Sciences, 2023
Study of a subsurface core (named F688) from northern Indiana provides integrated data sets linking Katian chronostratigraphic records of the Appalachian and Midcontinent basins.
Cristiana J. P. Esteves   +7 more
doaj   +1 more source

EVIDENCE OF A GUADALUPIAN AGE FOR THE KHUFF FORMATION OF SOUTHEASTERN OMAN: PRELIMINARY REPORT

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 1998
The Guadalupian succession of the Huqf area (Sultanate of Oman) represents a mega-sequence comprising the fluvial terrigenous Gharif Formation and the overlying marine Khuff Formation. The Khuff Fm.
LUCIA ANGIOLINI   +10 more
doaj   +1 more source

Calcium stable isotopes place Devonian conodonts as first level consumers

open access: yesGeochemical Perspectives Letters, 2019
Conodont animals are an extinct group of jawless vertebrates whose hard parts, also known as conodont elements, represent the earliest evidence of a mineralised skeleton in the vertebrate lineage.
V. Balter   +5 more
semanticscholar   +1 more source

UPPER DEVONIAN-LOWER CARBONIFEROUS CONODONTS FROM CHIANG DAO CHERTS, NORTHERN THAILAND

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2006
In Northern Thailand, radiolarites (radiolarian cherts) are very common and their study provides an important tool to understand the regional geology and moreover to localise the suture zone(s).
CARINE RANDON   +4 more
doaj   +1 more source

Upper Sandbian–lower Katian bio- and chemostratigraphy in the Pajevonys-13 core section, Lithuania [PDF]

open access: yesEstonian Journal of Earth Sciences, 2016
The succession of five formations (Auleliai, Vilučiai, Alvitas, Šakiai, Jakšiai) corresponding to the upper Sandbian and lower Katian in southern Lithuania is dated based on new bio- and chemostratigraphical data from the Pajevonys-13 core section.
Linda Hints   +4 more
doaj   +1 more source

On the possibility of introducing X-ray computed microtomography into the practice of biostratigraphic research

open access: yesGeoresursy
Currently, the techniques applied for extraction and study of conodonts from siliceous rocks are associated with a number of problems. This makes it difficult to solve many problems in the areas of development of the volcanic and volcanic-sedimentary ...
A. M. Fazliakhmetov   +3 more
doaj   +1 more source

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