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Geosciences, Volume 15, Issue 10

October 2025 - 36 articles

Cover Story: The Late Triassic (Norian) Manicouagan impact structure in northeastern Canada is one of the largest impact sites of the Phanerozoic, but has a sparse record of ejecta deposits.  Sedimentary layers at the top of a seismically deformed zone in playa deposits in the Norian-age Blomidon Formation in the Fundy Basin, 750 km away, contain shocked quartz and spherulitic grains that are interpreted as impact ejecta. The presence of ejecta at the top of the deformed zone suggests that the seismicity resulted indirectly from the Manicouagan impact via reactivation of a nearby fault system. Paleomagnetic correlation of the ejecta-bearing zone to the time scale for the Newark Basin suggests a discrepancy in the correlation of the Newark time scale to the magnetostratigraphic record of the Upper Triassic. View this paper
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Articles (36)

  • Article
  • Open Access
538 Views
39 Pages

Zircon Isotopic Constraints on Age, Magma Genesis, and Evolution of the Betic Ophiolites, Nevado-Filábride Complex, Spain

  • Encarnación Puga,
  • Antonio Díaz de Federico,
  • Miguel A. Díaz Puga and
  • José Miguel Nieto

20 October 2025

Metabasic rocks (eclogites and amphibolites) from four Betic ophiolite outcrops (Lugros, Almirez, Cóbdar, and Algarrobo), comprising Ol-Px gabbros, dolerites, and MORB-affinity basalts, were studied. U-Pb SHRIMP zircon dating yielded Early to...

  • Article
  • Open Access
495 Views
18 Pages

17 October 2025

Soil piping is the process by which subsurface water creates and enlarges channels, or “pipes,” within soil, enabling rapid and preferential flow beneath the surface. The collapse of these eroded pipes can lead to land degradation, gully...

  • Article
  • Open Access
2 Citations
1,040 Views
17 Pages

Evaluation of a Soviet-Era Gravimetric Survey Using Absolute Gravity Measurements and Global Gravity Models: Toward the First National Geoid of Kazakhstan

  • Daniya Shoganbekova,
  • Asset Urazaliyev,
  • Roman Sermiagin,
  • Serik Nurakynov,
  • Magzhan Kozhakhmetov,
  • Nailya Zhaksygul and
  • Anel Islyamova

17 October 2025

Determining a high-precision national geoid is a fundamental step in modernizing Kazakhstan’s vertical reference system. However, the country’s vast territory, complex topography, and limited coverage of modern terrestrial and airborne gr...

  • Article
  • Open Access
654 Views
24 Pages

Pilot Study on Fingerprinting the Isotopic Signatures of Fossiliferous Limestones as a Tool for Forensic Investigation of Fossil Trafficking (Cretaceous Crato Formation, Brazil)

  • Marcos Antônio Pimentel de Sousa,
  • Daniel Rodrigues do Nascimento Junior,
  • Anelize Manuela Bahniuk and
  • Giovanna Della Porta

16 October 2025

Unauthorized fossil trafficking violates national legislation and deprives cultural and natural heritage. This study proposes a pilot method to fingerprint the origin of fossils by characterizing the carbon and oxygen stable isotope signatures of fos...

  • Article
  • Open Access
525 Views
17 Pages

16 October 2025

Flash floods in Mediterranean mountain catchments are a significant natural hazard, but systematic historical records of their occurrence are often lacking. This study reconstructs the history of torrential activity in the previously unexplored Arroy...

  • Review
  • Open Access
558 Views
24 Pages

15 October 2025

The need to mathematically model and numerically simulate the effect of temperature on the hydro-mechanical behavior of soils, driven by the increased interest in energy geostructures and sundry other geothermal systems, has necessitated the developm...

  • Article
  • Open Access
666 Views
14 Pages

15 October 2025

The Manicouagan impact structure in northeastern Canada is one of the largest, well-documented impact sites among Phanerozoic structures. Once considered a candidate for the cause of end-Triassic extinctions, radioisotopic dating of impact melt rock...

  • Article
  • Open Access
1 Citations
465 Views
19 Pages

Composition and Genesis of Dark Dolomite-Type Nephrite in the Kavokta Deposit, Middle Vitim Mountain Country, Russia

  • Evgeniy V. Kislov,
  • Irina Yu. Kotova,
  • Viktor F. Posokhov,
  • Artem V. Trofimov and
  • Elena A. Khromova

14 October 2025

The Kavokta deposit in Russia contains gray and black dolomite-type nephrite, which is in high demand commercially. Although the fact that black nephrite has been found in several deposits, the reasons for its color are not well understood. The prese...

  • Article
  • Open Access
1 Citations
514 Views
26 Pages

Rate-Dependent Residual Strength of Unsaturated Slip-Zone Soil Under Suction-Controlled Conditions

  • Jin Yuan,
  • Rui Zhu,
  • Yanpian Mao,
  • Lanlan Xu,
  • Jianfan Zhao,
  • Chao Zhang and
  • Shu Zhang

14 October 2025

Reservoir landslides undergo saturated–unsaturated transitions under hydrological variations. Matric suction significantly influences slip-zone soil strength. Existing studies lack analysis of suction–rate–strength coupling, while A...

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Geosciences - ISSN 2076-3263