Results 91 to 100 of about 2,421 (198)

The Ames impact structure, Oklahoma: New radioisotopic constraints and implications for North American impact chronology

open access: yesMeteoritics &Planetary Science, Volume 61, Issue 8, Page 2103-2139, August 2026.
Abstract The Ames impact structure (Oklahoma) is thought to have formed during the Ordovician Meteor Event, based on conodont biostratigraphy of its crater fill. Here, U–Pb zircon dates from its impact‐melt portion, conducted using secondary ion mass spectrometry and laser ablation–inductively coupled plasma–mass spectrometry (n = 37 spots), yield a ...
Elizabeth J. Catlos   +9 more
wiley   +1 more source

Geochemical Evidence of First Forestation in the Southernmost Euramerica from Upper Devonian (Famennian) Black Shales. [PDF]

open access: yesSci Rep, 2019
Lu M   +8 more
europepmc   +1 more source

Upper Devonian in Devonshire [PDF]

open access: yesGeological Magazine, 1880
openaire   +1 more source

Early representatives of bryozoans from genus Nikiforovella Nekhoroshev, 1948 and their stratigraphical significance for Late Devonian-Early Carboniferous

open access: yesЛитосфера, 2017
The arm of the present paper is to evaluate the significance of species from genus Nikiforovella for stratigraphy of Devonian-Carboniferous boundary from different regions of Eurasia.
Zoya A. Tolokonnikova
doaj  

Some features of composition and genesis of terrigenous rocks of kolganskaya strata

open access: yesRUDN Journal of Engineering Research, 2012
The article is about Upper Devonian kolganskaya strata formed in delta front. Gamma-active benchs presented by clay deposits, were marked at the bottom of the kolganskaya strata, and its may be a good cap-rocks for the lower-lying rocks.
N V Pavlinova, V M Usova
doaj  

Stratigraphic palynology of Devonian boreholes from northern Saudi Arabia

open access: yesCarnets de Géologie, 2005
This extended abstract describes well-preserved palynomorph assemblages recovered from Devonian strata in five shallow boreholes in the northern part of Saudi Arabia.
Breuer Pierre   +5 more
doaj  

Fish/tetrapod Communities in the Upper Devonian

open access: yes, 2014
Vertebrate communities including tetrapods and fishes are known from a limited number of LateDevonian localities from several areas worldwide. These localities encompass a wide variety ofenvironments, from true marine conditions of the near shore neritic province, to fluvial or lacustrineconditions.
openaire   +1 more source

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