Results 51 to 60 of about 1,653 (179)

Mesozoic brachiopods of Mexico -a review and some comments on their paleobiogeographic affinities and paleoecology

open access: yesRevista Mexicana de Ciencias Geológicas, 2019
Recent work on the taxonomy and paleobiogeographic affinities of Mesozoic brachiopods from Mexico is reviewed. Brachiopods are lesser components of Mesozoic marine fossil assemblages from Mexico but are abundant at certain horizons… in order to continue,
Michael R. Sandy
doaj  

The present-day Mediterranean brachiopod fauna: diversity, life habits, biogeography and paleobiogeography

open access: yesScientia Marina, 2004
The present-day brachiopods from the Mediterranean Sea were thoroughly described by nineteenth-century workers, to the extent that Logan´s revision in 1979 listed the same 11 species as Davidson, almost 100 years earlier.
A. Logan   +3 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

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

Effect of the Mid-Carboniferous event on the diversity of brachiopods in the Middle and Southern Urals

open access: yesЛитосфера, 2020
Research subject. In this study, the distribution of brachiopods in the Mid-Carboniferous boundary (MCB) sediments in the Middle and Southern Urals was investigated with the aim of determining the influence of the global Serpukhovian-Bashkirian minor ...
N. A. Kucheva
doaj   +1 more source

The age of the brachiopod limestones from Guča, western Serbia [PDF]

open access: yesGeološki Anali Balkanskoga Poluostrva, 2010
The asymmetric rhynchonellide brachiopod Cyclothyris? globata (ARNAUD, 1877) has a large distribution in the Coniacian, Santonian and Campanian outcrops of the western Tethys.
Radoičić Rajka   +3 more
doaj   +1 more source

Brachiopods of the Imtachan Formation in the Upper Permian of the Southern Verkhoyanie, Northeast Russia

open access: yesУчёные записки Казанского университета: Серия Естественные науки, 2023
An extensive collection of fossil brachiopods, all assigned to the Wuchiapingian Stage, was recovered from the lower part of the Imtachan Formation along the Ustupnyi Creek (right tributary of the Setorym River) in the Southern Verkhoyanie.
R. V. Kutygin, V. I. Makoshin
doaj   +1 more source

Climate conditions on the South‐Iberian Palaeomargin during the latest Pliensbachian to early Toarcian: A mineralogical and geochemical study from hemipelagic deposits

open access: yesSedimentology, Volume 73, Issue 5, Page 1631-1663, August 2026.
ABSTRACT The integrated analysis of lithofacies, mineralogy and geochemistry of the hemipelagic marine succession exposed in La Cerradura section (South‐Iberian Palaeomargin) provides new information to characterise the palaeoenvironmental conditions during the latest Pliensbachian to early Toarcian, including the Jenkyns Event.
Chaima Ayadi   +4 more
wiley   +1 more source

A thorny evolution: first Triassic ammonoid with a ventral apertural elongated rostrum

open access: yesPapers in Palaeontology, Volume 12, Issue 4, July/August 2026.
Abstract Ornamented terminal peristomes are common in ammonoids, but pronounced conch projections are rare, particularly in the Triassic. A new early Spathian assemblage from southeastern Idaho yielded two ammonoid specimens with an impressive terminal mid‐ventral elongated rostrum, documenting the first Triassic occurrence and one of the few ...
Arnaud Brayard   +8 more
wiley   +1 more source

Cambrian small shelly fossils from North Greenland (eastern Laurentia; Series 2, Stage 4) with regional and global correlations

open access: yesPapers in Palaeontology, Volume 12, Issue 4, July/August 2026.
Abstract Cambrian Series 2 represents a key interval for documenting the evolution and diversification of early biomineralized skeletal animals. In this interval, small shelly fossils (SSF) provide an essential archive for regional biostratigraphy and intercontinental correlation.
Yeongju Oh   +2 more
wiley   +1 more source

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