Results 41 to 50 of about 2,615 (200)

Late Campanian (74–71 Ma) Arabia–Eastern Anatolia Collision and Its Geodynamic Implications

open access: yesTectonics, Volume 45, Issue 7, July 2026.
Abstract The East Anatolian Plateau is a major collisional feature within the Tethyan realm formed as a late‐stage result of the collision between East Anatolia and the Arabian Platform. The timing of this collision is highly debated, with estimates from the Late Cretaceous to the Miocene.
Remziye Akdoğan   +7 more
wiley   +1 more source

Morphometric changes in two Late Cretaceous calcareous nannofossil lineages support diversification fueled by long-term climate change

open access: yesPeer Community Journal, 2022
Morphometric changes have been investigated in the two groups of calcareous nannofossils, Cribrosphaerella ehrenbergii and Microrhabdulus undosus across the Campanian to Maastrichtian of the Zagros Basin of Iran.
Razmjooei, Mohammad Javad   +1 more
doaj   +1 more source

Quantification of the Eocene–Oligocene transition in the Zagros Foreland Basin: Palaeogeographic control on sequence architecture and tectonic signal preservation

open access: yesThe Depositional Record, Volume 12, Issue 3, June 2026.
New bio‐sequence framework for the Eocene–Oligocene transition in Zagros. Geochemical data validate basin depth control on SB1 vs. SB2 boundaries. SEM‐EDS analyses confirm subaerial exposure versus continuous deposition. Sensitivity analysis quantifies sub‐10% uncertainty in stratigraphic interpretations. Resolves the Pyrenean orogeny's variable impact
Sahar Rokni   +4 more
wiley   +1 more source

In Search of the Lost Brown Trout (Salmo trutta Complex) Using DNA of Ancient and Modern Samples From the Southern Italian Peninsula

open access: yesEvolutionary Applications, Volume 19, Issue 6, June 2026.
ABSTRACT The current diversity and distribution of species and populations have been shaped by the major climatic oscillations during the Quaternary. The brown trout (Salmo trutta) is a striking example of the strong effect of past climate changes on the evolutionary history of species, in fact, the alternation of glacial/interglacial cycles has led to
Tatiana Fioravanti   +5 more
wiley   +1 more source

Flux and Isotopic Composition of Sedimentary Carbon Subducting Along the World's Trenches

open access: yesGeochemistry, Geophysics, Geosystems, Volume 27, Issue 5, May 2026.
Abstract Here we provide comprehensive estimates for the subducted sedimentary flux of inorganic and organic carbon and δ13C at 16 trench segments worldwide. Our calculations provide minimum (incoming sediment), maximum (trench fill) and best estimates (underthrust) of carbon fluxes.
Terry Plank, Alberto Malinverno
wiley   +1 more source

Distephanopsis concavus Horvat: a revised silicoflgellate species from the Middle Miocene of the Central Paratethys

open access: yesGeologija, 2016
The silicoflgellate species Distephanopsis concavus Horvat is revised based on further research of the type material. This species is characterized by having a basal ring with strongly concave sides which reduce the basal ring area and by four symmetry
Aleksander Horvat
doaj   +1 more source

THE EARLY PLIOCENE MAMMAL ASSEMBLAGE OF VAL DI PUGNA (TUSCANY, ITALY) IN THE LIGHT OF CALCAREOUS PLANKTON BIOSTRATIGRAPHICAL DATA AND PALEOECOLOGICAL OBSERVATIONS

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2001
The stratigraphy of clayey and sandy beds outcropping in Val di Pugna locality near Siena (Tuscany, Italy) celebrated for the past finds of fossil mammalian remains, is studied here.
GIOVANNI BIANUCCI   +4 more
doaj   +1 more source

Eocene belemnites from Hungary

open access: yesPapers in Palaeontology, Volume 12, Issue 2, March/April 2026.
Abstract The Middle Eocene nummulitic limestone at Dudar, Transdanubian Hungary, has yielded several belemnite rostra during the last 60–70 years. The correct interpretation of these fossils was made possible by the fact that one of these specimens retained the remnants of the conotheca within the alveolus, while others preserved the conical, tapering ...
András Galácz
wiley   +1 more source

Calcareous nannofossil paleofluxes as proxy of pCO2 fluctuations during the Early Cretaceous

open access: yes, 2010
Calcareous nannoplankton is an excellent proxy for detecting present and paste surface water conditions, being extremely sensitive to changes in temperature, fertility, salinity and chemical conditions of the oceans.
D. Tiraboschi, E. Erba, C. Bottini
core   +2 more sources

LE NANNOPLANCTON CALCAIRE ET LA FORMATION DES ALTERNANCES CALCAIRES-MARNES DANS LE LIAS DES BASSINS DE MARCHES-OMBRIE (ITALIE)

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2017
In the classical sections of Sentino-Valdorbia, Bosso and the Marne di Monte Serrone type-section the rhythmic, limestone/marl sedimentation of the following formations were studied: the Corniola (Late Sinemurian to Earliest Toarcian) and the Marne di ...
DENISE NOËL   +3 more
doaj   +1 more source

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