Results 61 to 70 of about 2,503 (171)

Devonian strata of the Southern Timan: paleomagnetic data [PDF]

open access: yesНефтегазовая геология: Теория и практика
New paleomagnetic determinations are presented based on a reconnaissance collection of rocks of the Frasnian and Famennian stages of the Upper Devonian, selected on the river Ukhta and river Izhma.
Iosifidi A.G., Sal'naya N.V.
doaj  

1.38 Ga Four‐Layer Tuff Marker Horizon in North China black Shales as a Chronostratigraphic Boundary for the Pre‐Ediacaran Geological Timescale

open access: yesGeophysical Research Letters, Volume 52, Issue 17, 16 September 2025.
Abstract Boundaries in the Phanerozoic chronostratigraphic scale are mainly precisely defined and dated, and many correspond to environmental catastrophes induced by the emplacement of LIPs. The pre‐Ediacaran geological timescale is currently subdivided by approximate absolute ages.
Shuan‐Hong Zhang   +7 more
wiley   +1 more source

Frasnian Faunal Counts

open access: yes, 2013
These data are faunal counts from bedding planes of slabs constrained to Frasnian units. These data are from western New York and consist almost entirely of brachiopods identified to the genus ...
Steven M. Holland (366306)   +2 more
core   +1 more source

LATE DEVONIAN (FRASNIAN) CORALS FROM CENTRAL DOLPO, NEPAL

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2017
Rugosa and Tabulata from the Late Devonian of central Dolpo (Nepal) belong to the genera Kuangxiastraea, Scruttonia, Sinodisphyllum, Tabulophyllum (?), Fruehwirthia gen. n., Thamnopora, Cladopora, Alveolites and Alveolitella.
HELMUT FLUEGEL, ANDREA TINTORI
doaj   +1 more source

The Uplift of Armorica and the Bretonian Movements of the Variscan Orogeny‐New Insights From Detrital Zircons in the Early Carboniferous Terrigenous Rocks of the Laval Basin (Armorican Massif, France)

open access: yesGeochemistry, Geophysics, Geosystems, Volume 26, Issue 6, June 2025.
Abstract In the French Armorican Massif, the Bretonian phase of the Variscan orogeny has been defined by the Late Devonian (Famennian‐Frasnian) erosion gap, and the Early Carboniferous (Tournaisian) syntectonic terrigenous deposits of the l’Huisserie formation in the Laval basin in the Central‐North Armorican Domain, ascribed to the Armorica ...
Wei Lin, Michel Faure, Lingtong Meng
wiley   +1 more source

Rugose corals and brachiopods across the Frasnian-Famennian boundary in Central Hunan, South China [PDF]

open access: yes, 2002
We present taxonomic revision of rugose corals and brachiopods from several Frasnian-Fammenian (F-F) boundary sections in central Hunan Province, China.
Hao, W., Liao, W., Ma, X, Sun, Y.
core  

The stages of сalcareous Algae development in the Urals during Devonian

open access: yesЛитосфера, 2015
The article highlights the following stages of the development microscopic Devonian Algae in the Urals: the rise of Algae in the early Devonian (Karpinski time), degradation of Algae flora during the end of Early Devonian (taltiysk time), the Middle ...
A. L. Anfimov
doaj   +2 more sources

UPPER FRASNIAN (UPPER DEVONIAN) POLYGNATHUS AND ICRIODUS CONODONTS FROM THE BAHRAM FORMATION, HUR SECTION, KERMAN PROVINCE, SOUTHEASTERN IRAN

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2012
Conodont fauna from the Upper Devonian (Frasnian) Bahram Formation at the Hur section, north of Kerman, southeast Iran, is dominated by species of Icriodus and Polygnathus. This fauna allowed discrimination of two biointervals from the Lower rhenana Zone
TAYEBEH AHMADI   +2 more
doaj   +1 more source

Chondrichthyan fauna of the Frasnian-Famennian boundary beds in Poland [PDF]

open access: yes, 2002
New chondrichthyan microremains from several Frasnian–Famennian sections in the Holy Cross Mountains and Dębnik area (Southern Poland) are investigated and compared to previous data.
Ginter, M
core  

Body size and geographic distribution of foraminiferal specimens during the Frasnian-Famennian (Frasnian), Guadalupian-Lopingian (Capitanian), Permian-Triassic (Changhsingian), Triassic-Jurassic (Rhaetian), and Cretaceous-Paleogene (Maastrichtian) mass extinctions.

open access: yes, 2023
<p>This dataset is about body size and geographic distribution of foraminiferal specimens during the Frasnian-Famennian (Frasnian), Guadalupian-Lopingian (Capitanian), Permian-Triassic (Changhsingian), Triassic-Jurassic (Rhaetian), and Cretaceous ...
Hanchen Song   +8 more
core   +1 more source

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