Results 71 to 80 of about 2,313 (204)

PRIMER REGISTRO PALINOLÓGICO DE LA FORMACIÓN PUNTA NEGRA (DEVÓNICO MEDIO-SUPERIOR), DE LA PRECORDILLERA DE SAN JUAN, ARGENTINA

open access: yesPublicación Electrónica de la Asociación Paleontológica Argentina, 2010
This paper presents the first palynological record of the Punta Negra Formation, Devonian from the San Juan Precordillera, Argentina. Twelve acritarchs species, 11 spores species, 5 prasinophyte species, 2 chitinozoans genera and one incertae sedis were ...
Claudia V. Rubinstein
doaj  

EARLY ORDOVICIAN AND DEVONIAN CONODONTS FROM THE WESTERN KARAKORAM AND HINDU KUSH, NORTHERNMOST PAKISTAN

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 1999
Extensive tracts of Devonian and older sedimentary and igneous units occur within the axial region of the western Karakoram Block of northernmost Pakistan over a distance in excess of 200 km between the the headwaters of the Karambar valley in ...
JOHN A. TALENT   +5 more
doaj   +1 more source

New data on acanthodians of the Middle Devonian of the Main Devonian Field (in Russian)

open access: yes, 2015
New data on distribution of acanthodian taxa in the exposure of Eifelian and Givetian (Middle Devonian) deposits located in the Lemovzha River basin (Leningrad Region, Russia) is analysed with the aim to clarify the position of the Eifelian-Givetian boundary in the section.
openaire   +2 more sources

Early-Devonian intrusive magmatism of the Urals as indicator critical stage Paleozoic history mobile belt

open access: yesЛитосфера, 2015
It is established that during all-Uralian stage of mantle-type magmatism of Early Devonian age (410-393 Ma) the mantle Ordovician-Silurian magmatism was changed by mantle-crustal and crustal types.
G. B. Fershtater
doaj   +2 more sources

The Magnetic Signature of Shear Zones in Marbles and Experimental Simulations

open access: yesGeoscience Data Journal, Volume 13, Issue 4, October 2026.
This dataset explores how strain, microstructure, texture and magnetic susceptibility interact in natural and experimental shear zones. It includes data from low‐ and high‐temperature marble shear zones and analogue experiments simulating different deformation regimes.
Vladimír Kusbach   +8 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

Fish Scales: A Multifunctional Biomaterial from Nature

open access: yesENERGY &ENVIRONMENTAL MATERIALS, Volume 9, Issue 5, September 2026.
Fish scales demonstrate nature's solution to impact protection through overlapping multilayered architecture. This biological design combines mineralized surfaces with collagen networks to achieve both flexibility and fracture resistance. The structural principles inspire advanced protective materials and biomedical implants, where damage tolerance ...
Liyao Dong, Xiaojie Sun, Xiguang Chen
wiley   +1 more source

Composition and Provenance of Victoria Group Sandstones in Southern North Victoria Land, Antarctica

open access: yesNew Zealand Journal of Geology and Geophysics, Volume 69, Issue 3, September 2026.
Three distinct source areas contributed to sandstones of the Victoria Group within the Transantarctic Basin in southern North Victoria Land. During the Permian, quartzose sandstones were derived from erosion of the local Ross Orogen, likely from an uplifted swell in the area of today's Ross Sea, the Ross High.
Martin Elsner   +6 more
wiley   +1 more source

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