Results 21 to 30 of about 3,102 (219)

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

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

Biostratigraphy of the Ruteh Formation at Harijan section (Central Alborz) northern Iran using foraminifera and conodont

open access: yes, 2009
In order to study the fossil contents of the Ruteh Formation for biostratigraphical purposes, the 200 meters thick section was sampled at Harijan section, Central Alborz. The sequence is mainly made up of limestone and shale's.
Meysam Shafiee Ardestani   +4 more
core   +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

CONODONT DISTRIBUTION ACROSS THE MID-CARBONIFEROUS BOUNDARY IN THECENTRAL TAURIDES, TURKEY

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2012
The Mid-Carboniferous boundary in the Aladað Unit of the Central Taurides, previously delineated on the basis of foraminifers, is now further recognizable on the basis of conodonts.
AYSE ATAKUL-ÖZDEMIR   +2 more
doaj   +1 more source

FIRST RECORD OF ORDOVICIAN CONODONTS FROM SOUTHWESTERN SARDINIA

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2017
A first illustration of Ordovician conodonts from Sardinia is briefly given. The assemblage, belonging to the HDS biofacies, indicates an early-middle Ashgillian age.
ANNALISA FERRETTI, ENRICO SERPAGLI
doaj   +1 more source

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