Results 51 to 60 of about 232 (180)

On the crystallization conditions of the Neoproterozoic, high-K calc-alkaline, Bragança Paulista-type magmatism, southern Brasília Orogen, SE Brazil

open access: yesBrazilian Journal of Geology
: Syn-orogenic Neoproterozoic granitic magmatism (ca. 630-600 Ma) in southern Brasília Orogen includes large batholiths of compositionally expanded high-K calc-alkaline granites (lato sensu) and small occurrences constituted by anatetic leuco-granites ...
Andrés Fabián Salazar-Naranjo   +1 more
doaj   +1 more source

The pre‐Vendian (640–610 ma) granite magmatism in the Central Taimyr fold belt: the final stage of the Neoproterozoic evolution of the Siberian paleocontinent active margin

open access: yesГеодинамика и тектонофизика, 2019
Eastern part of the Central Taimyr belt is composed of Precambrian rocks penetrated by granites of the Snezhnaya complex (845–825 million years) and later overlain by mid‐Neoproterozoic sin‐ postorogenic sedimentary deposits of the Stanovaya‐Kolosova ...
A. B. Kuzmichev   +5 more
doaj   +1 more source

Gully erosion in India: Geo‐environmental controls and region‐specific characteristics

open access: yesGeographical Research, Volume 64, Issue 2, May 2026.
Spatial statistical analyses using a novel spatial database of India‧s gully erosion landforms revealed that India has six major gullying‐affected regions, three of which (EU, DU, and KCH) are dominated by gully systems (gully networks), with badlands (vast intensely gullied landscapes) being predominant in the other three regions (YB, GP, and RU ...
Anindya Majhi   +3 more
wiley   +1 more source

High‐Resolution Digital Terrain Model and Land‐Surface Parameters of São Sebastião and Ilhabela, Southeastern Brazil

open access: yesGeoscience Data Journal, Volume 13, Issue 2, April 2026.
The first openly accessible 2 m‐resolution lidar‐based DTM and an extensive set of land‐surface parameters (LSPs) for the region of São Sebastião and Ilhabela, southeastern Brazil, reveal geomorphological features previously indiscernible, including past landslide deposits, drainage captures and structural lineaments.
Rebeca Durço Coelho   +3 more
wiley   +1 more source

Dating C/S Structures in Syntectonic Granites by In Situ Rb‐Sr Analyses on Muscovite

open access: yesTerra Nova, Volume 38, Issue 2, Page 124-129, April 2026.
ABSTRACT The interplay of crystallisation, deformation and fluid–rock interactions makes deciphering geochronological information complex in syntectonic granites. In this study, we apply in situ Rb‐Sr analyses to selected samples from the Questembert Variscan syntectonic granite in Western France, which was emplaced along the South Armorican Shear Zone
Philippe Boulvais, Romain Tartèse
wiley   +1 more source

Moss diatoms show regional structuring, high potential endemism, and an inverse latitudinal diversity gradient in the Arctic

open access: yesEcography, Volume 2026, Issue 3, March 2026.
Microorganisms perform essential functions in Arctic terrestrial ecosystems. Yet, their ecology and biogeography are poorly understood, despite being necessary to predict microbial responses to future climate change. Here, we provide the first large‐scale floristic and biogeographic study of the moss diatom flora in the tundra regions of the North ...
Charlotte Goeyers   +6 more
wiley   +1 more source

Sr isotopic composition of Finnish rapakivi granites: the Suomenniemi batholith [PDF]

open access: yesBulletin of the Geological Society of Finland, 2019
T. Rämö
doaj   +1 more source

Non‐saproxylic beetles in beech forests: Larval habitat, trophic guild structure in a case study from the Czech Republic

open access: yesEcosphere, Volume 17, Issue 3, March 2026.
Abstract Beech forests in Central Europe are frequently the focus of entomological studies targeting saproxylic beetle species that depend on deadwood. However, considerably less attention has been paid to non‐saproxylic beetle species. Our research aimed to address this gap by focusing on the diversity and abundance of functional guilds of non ...
Václav Zumr   +2 more
wiley   +1 more source

Porphyritic pyroxene-bearing granitolds - a strongly weathered rock group in central Finland

open access: yesFennia: International Journal of Geography, 1985
Intense preglacial weathering is associated with porphyritic pyroxene­ bearing quartz syenites, quartz monzonites, quartz monzodiorites and monzogranites, which form synorogenic stocks and batholiths in central Finland.
Seppo I. Lahti
doaj  

Global Comparison of Aqueous Geochemistry and Dissolved H2/CH4 in Continental Low Temperature Serpentinization–Influenced Environments

open access: yesHydrological Processes, Volume 40, Issue 3, March 2026.
Conceptual diagram of hydrological and geochemical processes within the Santa Elena Ophiolite, Costa Rica. It highlights watershed cross‐sections, soil genesis, hyperalkaline Type II waters (pH > 11.6) with calcite crust and trapped H2/CH4 gases, seepage into surface waters, storm‐impacted stream profiles, weathered vs.
Alexandra May   +8 more
wiley   +1 more source

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