Results 81 to 90 of about 4,777,907 (176)

Zircon U-Pb geochronology and trace element dataset from the Southern Rocky Mountain Volcanic Field, Colorado, USA. [PDF]

open access: yesData Brief, 2022
Sliwinski JT   +5 more
europepmc   +1 more source

Automatic Crater Classification Using a Deep‐Learning‐Based Pipeline

open access: yesJournal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 5, October 2026.
Abstract Identifying and classifying impact craters on Mars is crucial for understanding the planet's geological history and surface evolution. Traditional crater classification relies on manual annotation methods, which are often limited by human biases and the difficulty of interpreting geomorphological features.
L. Martinez   +3 more
wiley   +1 more source

Diagenetic controls on porosity evolution and pore type organisation in microporous carbonate rocks: Evidence for mesogenetic porosity formation

open access: yesSedimentology, Volume 73, Issue 6, Page 2353-2380, October 2026.
ABSTRACT Microporous carbonate rocks typically record complex diagenetic histories driven by microbial activity and fluid interactions within multiple diagenetic environments. The relative roles of meteoric and burial diagenetic processes in pore evolution remain debated, particularly within Cretaceous carbonate systems of the Middle East, as does the ...
Hugues Bitault   +5 more
wiley   +1 more source

Limitotipes of Lower Sakmarian and Artinskian stages boundary in the Urals

open access: yesЛитосфера, 2015
The section Usolka and duplicating its section Dal’ny Tulkas (Bashkortostan) are proposed as the stratotypes of the Lower Sakmarian stage boundary and Lower Artinskian stage boundary of the International Stratigraphic scale.
V. V. Chernykh, B. I. Chuvashov
doaj   +2 more sources

Evidence for the continental origin of Pliocene deposits in the central Baja California peninsula, Mexico, and implications for controls on biodiversity

open access: yesSedimentology, Volume 73, Issue 6, Page 2488-2518, October 2026.
ABSTRACT Previous studies have documented genetic divergence within the last few million years between northern and southern populations of terrestrial plants and animals along the Baja California peninsula, with many studies hypothesising that the divergence is due to an ancient seaway that crossed the central peninsula and created a physical barrier ...
Kevin K. Gardner   +8 more
wiley   +1 more source

A Shallow‐Marine Ecosystem Before Initial Tibetan Plateau Uplift

open access: yesGeophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract The uplift of the Tibetan Plateau profoundly influences global atmospheric circulation, sediment transport, and biodiversity, but its pre‐uplift marine paleoenvironment remains poorly understood. Here we report the first discovery of an in situ benthic fossil assemblage from the Puga area in central Tibet, which was deposited on a shallow ...
Ming Wang   +12 more
wiley   +1 more source

Provenance of Middle Triassic sediments in the Southern Youjiang Basin: Insights from detrital zircon geochronology and tourmaline geochemistry

open access: yesThe Depositional Record, Volume 12, Issue 4, September 2026.
Middle Triassic turbidites in the Youjiang Basin were chiefly derived from a Late Palaeozoic continental arc along the southeastern South China Block, as revealed by detrital zircon U–Pb geochronology and tourmaline geochemistry, supporting a tectonic model driven by Paleo‐Pacific subduction rather than Paleo‐Tethyan closure.
Yumei Wei, Lanqiu Meng, Yu Zhang
wiley   +1 more source

Permian fluid circulation and deformation along a crustal-scale shear zone in the Montagne Noire gneiss dome (southern French Massif Central)

open access: yesBSGF - Earth Sciences Bulletin
U-Th-Pb LA-ICPMS (Laser Ablation − Inductively Coupled Plasma Mass Spectrometry) has the power to elucidate the timing of metamorphism, deformation, migmatization, and plutonism.
Roger Françoise   +9 more
doaj   +1 more source

Flexural bulges and foredeep basins: Dynamic tectonic control on shifting depocentres and condensed facies, Upper Cretaceous (Santonian), Western Canada Foreland Basin

open access: yesThe Depositional Record, Volume 12, Issue 4, September 2026.
Allostratigraphically defined mudstone packages show marked along‐strike thickness variation, interpreted to be related to shifting thrust activity in the orogen; loading cycles lasted about 750 kyr. Close to the orogen, the forebulge is mantled by shelly sandstone whereas far from the orogen, the forebulge is typified by organic‐rich mudstone ...
Omar N. Al‐Mufti   +4 more
wiley   +1 more source

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