Results 71 to 80 of about 6,109 (226)

New U-Pb SHRIMP zircon ages for pre-variscan orthogneisses from Portugal and their bearing on the evolution of the Ossa-morena tectonic zone [PDF]

open access: yes, 2006
New SHRIMP U-Pb zircon ages for the Portalegre and Alcáçovas orthogneisses document a complex pre-Variscan history for the Iberian basement in Portugal. The available geochemical and geochronological data for the Alcáçovas orthogneiss (ca.
Andrade, A. S.   +6 more
core   +3 more sources

Crustal Structure of Laurentia and Peri‐Gondwanan Terranes Beneath Ireland and Britain and Comparison With Eastern North America

open access: yesJournal of Geophysical Research: Solid Earth, Volume 131, Issue 2, February 2026.
Abstract The Appalachian‐Caledonian orogen was built during the Paleozoic by accretion of peri‐Gondwanan terranes onto Laurentia, culminating in the formation of Pangea. During the Mesozoic, Pangea broke apart, displacing one section of the belt to eastern North America and another to northwestern Europe.
Roberto Masis   +4 more
wiley   +1 more source

Breedon Hill [PDF]

open access: yes, 2013
Breedon Hill forms one of the most prominent features in the landscape of north-west Leicestershire, standing up 50 m above the surrounding ground. That it has been a major landmark throughout recorded history is suggested by its name, which is derived ...
Ambrose, Keith
core  

The Permo-Carbonigferous Facies Development in Thailand: A plate tectonic discussion [PDF]

open access: yes, 1989
The Permo-Carboniferous sedimentary facies development in Thailand reflects the late Variscan orogeny in S E Asia. During the Carboniferous and Permian, a N -S trending trough separated the " S h a n Thai Craton" and the "Indosinia Craton".
Altermann, Wladyslaw
core   +1 more source

Fracture‐Assisted Pressure Solution Creep of Granite: An Example From the Mont Blanc Massif, Western Alps

open access: yesJournal of Geophysical Research: Solid Earth, Volume 131, Issue 2, February 2026.
Abstract The Mont Blanc granite, as other deformed granites, has splitting properties attributed to two perpendicular planes: one formed by aligned fractures and the other by aligned micas in foliation planes. It is shown that this microstructure results from ductile deformation with stress‐driven dissolution of quartz and feldspar that passively ...
Jean‐Pierre Gratier   +2 more
wiley   +1 more source

Geological investigations of the Lizard District, Cornwall, England: 1818–1883 [PDF]

open access: yesHistory of Geo- and Space Sciences
A lower Paleozoic slab of oceanic lithosphere was obducted onto the southern margin of Avalonia during the Variscan orogeny and is now exposed throughout the Lizard District of Cornwall, England.
C. N. Drummond
doaj   +1 more source

Maturity modelling of well 110/07b- 6 [PDF]

open access: yes, 2016
This report details one-dimensional (1D) maturity modelling of well 110/07b- 6 in the Carboniferous rocks of the UK Irish Sea for the 21CXRM Palaeozoic project. The aim of the maturity modelling was to predict when the source rock reached the oil and gas
Gent, C.M.A.
core  

Lateral termination of the north-directed Alpine orogeny and onset of westward escape in the Western Alpine arc: Structural and sedimentary evidence from the external zone [PDF]

open access: yes, 2011
31p.International audienceThe initial propagation of the Western Alpine orogen was directed northwestward, as shown by basement-involved and Mesozoic sedimentary cover compressional structures and by the early foreland basins evolution.
Authemayou, Christine   +3 more
core   +2 more sources

Evolution and Provenance of the Polish Rotliegend in the Southern Permian Basin

open access: yesJournal of Geophysical Research: Earth Surface, Volume 131, Issue 2, February 2026.
Abstract The Southern Permian Basin (SPB) has been extensively explored for ore deposits. However, a comprehensive evaluation of the remaining copper potential, specifically for sediment‐hosted stratiform copper system, remains lacking. This study applies goSPL, an open‐source landscape and stratigraphic evolution model, to reconstruct the Permian rift‐
Beatriz Hadler Boggiani   +3 more
wiley   +1 more source

Geology and tectonic setting of the Fornovolasco area, Alpi Apuane (Tuscany, Italy)

open access: yesJournal of Maps, 2018
The study area is located in the Alpi Apuane (Tuscany, Italy), and extends between N 44°0′49.883″–E 10°20′23.467″ (SW corner) and N 44°2′53.403″–E 10°23′19.175″ (NE corner).
Diego Pieruccioni   +3 more
doaj   +1 more source

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