Results 51 to 60 of about 353 (180)

Polymict melt‐bearing breccia dikes in the Morokweng impact structure formed by slip‐induced mechanical mixing of pseudotachylite and cataclasite along large‐displacement impact faults

Meteoritics &Planetary Science, EarlyView.
Abstract A core drilled through shocked and faulted Archean granitoid gneisses and dolerites in the eroded peak ring of the 70–80 km diameter Morokweng impact structure intersects multiple centimeter‐ to meter‐wide clastic‐matrix breccias containing a polymict clast population of lithic and mineral clasts and altered, millimeter‐ to centimeter ‐size ...
Roger L. Gibson, S'lindile S. Wela, Leonidas C. Vonopartis, Marco A. G. Andreoli   +3 more
wiley   +1 more source

Araguainha Dome, Brazil: A polygonal impact structure due to a complex pre‐impact regional structural framework

Meteoritics &Planetary Science, EarlyView.
Abstract We investigated the structural framework of the north–northwestern Paraná Basin in Brazil to test whether the pre‐impact structures in this region may have had any influence on the first‐order formation and morphostructure of the Araguainha impact structure (AIS).
Renato B. Bernardes, Wolf U. Reimold, Roger L. Gibson, Julia B. Curto Ma, Adolfo B. Silva, Natalia Hauser   +5 more
wiley   +1 more source

A Millennium of Coastside Occupation. Micromorphological Insights From the Indigenous Site of Las Estacas Cave, Tenerife

Geoarchaeology, Volume 41, Issue 3, May/June 2026.
ABSTRACT The archaeological site of Las Estacas Cave (NW Tenerife, Canary Islands) preserves some of the earliest human occupations in Tenerife, dating to the 2nd century CE, spanning the entire pre‐European time range up to the 15th century. Using soil micromorphology, this study applies a geoarchaeological approach to reconstruct site formation ...
Pedro García‐Villa, Cristo M. Hernández, Carolina Mallol   +2 more
wiley   +1 more source

Tectonophysical analysis and geodynamic interpretation of the three-dimensional geophysical model of the Ukrainian Shield

Геофизический журнал, 2010
Geodynamic features of the Ukrainian Shield (USh) from Early Precambrian to Phanerozoic have been considered based on tectonophysical analysis of complex geophysical 3D model of the Shield, produced at the Institute of Geophysics of the National Academy ...
O.B. Gintov, I. K. Pashkevich
doaj   +1 more source

The possible degassing nature of some local structures of concentric and zonal structure on the territory of the Volyn-Podolye plate and the Western part of the Ukrainian Shield and the way of their subsequent study

Геофизический журнал, 2020
The article considers some specific features of the fracture-block structure of the Podolye and Volyn megablocks of the Ukrainian Shield, as well as the Volyn-Polesye volcano-plutonic belt (within the sheet of M-35-IX — «Kostopol») in connection with ...
V.A. Entin, S.I. Guskov, B.M. Dziuba, O.B. Gintov, M.I. Orlyuk, S.V. Mychak   +5 more
doaj   +1 more source

Holocene subaqueous landslide dynamics in the Lake Siljan‐Orsasjön Basin, south‐central Sweden

Earth Surface Processes and Landforms, Volume 51, Issue 3, March 2026.
Subaqueous landslide areas studied by multibeam bathymetry, sub‐bottom profiling and sediment coring reveal complex stratigraphies, suggesting mass movement events starting close to the area's deglaciation and up to very recent times. Abstract The Siljan‐Orsasjön Basin in south‐central Sweden hosts two prominent lakes.
Per Möller, Dan Hammarlund, Karl Ljung, Matt O'Regan, Linda Hoff, Emelie Ståhl, Martin Jakobsson   +6 more
wiley   +1 more source

Geochemical Characteristic of Metabasites of Greenstone's Komatiite-Basalt Association of the Middle-Dnieper and Per-Azov Megablocks of the Ukrainian Shield

, 2009
Выполнено геохимическое изучение метабазитов коматиит-базальтовой ассоциации зеленокаменных структур Среднеприднепровского и Приазовского мегаблоков Украинского щита. Выявлено, что в тектонических зонах они в значительной мере изменены постмагматическими
Самборская, И.А., Артеменко, Г.В., Демедюк, В.В.   +2 more
core   +2 more sources

Geological structure and magmatism of the Shchuchinsky megablock (Polar Urals)

NEWS of the Ural State Mining University, 2020
Purpose of the work: determination of the geological structure, occurences of magmatism and geodynamics of the northernmost isolated segment of the paleooceanic sector of the Ural mobile belt – the Shchuchinsky megablock. Geographic disconnection with the southern structures of the Ural mobile belt and sub-ring structure have led to both a suspended ...
openaire   +1 more source

Impact Resurfacing of the Artemis Exploration Zone: Sample Locations for Primordial Crust and South Pole‐Aitken (SPA) Ejecta

Journal of Geophysical Research: Planets, Volume 130, Issue 10, October 2025.
Abstract Regolith samples from the lunar south pole are expected to contain material from the ancient lunar crust and potentially the uppermost mantle, excavated by the South Pole‐Aitken (SPA) impact. In this study, we aim to understand the impact resurfacing processes following the SPA impact and the subsequent redistribution of primordial crust and ...
T. Frueh, A. Camon, M. Boyce, S. L. Halwa, G. Ligeza, M. Lemelin, B. J. Thomson, D. A. Kring   +7 more
wiley   +1 more source

Rapid caldera subsidence and fluctuating eruption dynamics: the lithostratigraphy and structure of the Loch Bà Caldera, Isle of Mull, NW Scotland

Volcanica
Caldera-forming eruptions represent extremely hazardous events. The Loch Bà Caldera on the Isle of Mull, NW Scotland, preserves an ~120 m thick sequence of Palaeogene silicic pyroclastic rocks and collapse breccias.
Peter Nicholls, David Brown, Ross Dymock
doaj   +1 more source