Results 11 to 20 of about 622,682 (279)

The Concept of Lineaments in Geological Structural Analysis; Principles and Methods: A Review Based on Examples from Norway

open access: yesGeomatics
Application of lineament analysis in structural geology gained renewed interest when remote sensing data and technology became available through dedicated Earth observation satellites like Landsat in 1972.
Roy H. Gabrielsen, Odleiv Olesen
doaj   +2 more sources

Geology of the Mutis Complex, Miomaffo, West Timor

open access: yesAustralian Journal of Earth Sciences, 2023
Mesozoic forearc assemblages are widespread across Indonesia, and these are also exposed in the overthrust terranes on Timor. The oldest rocks in the allochthonous Mutis Complex, West Timor are Mesozoic basaltic volcaniclastic rocks and melange ...
R. Berry   +4 more
semanticscholar   +1 more source

Geology of amethyst quartz deposits from Montezuma and surrounding areas of Minas Gerais and Bahia States

open access: yesGeologia USP Série Científica, 2023
Amethyst quartz deposits occur in some regions of Minas Gerais state, Brazil, related to different geological environments. The most important are associated with hydrothermal veins crossing the Espinhaço mountain range, mainly in small and eroded ...
M. Chaves   +3 more
semanticscholar   +1 more source

Basement geology and its controls on the nucleation and growth of rift faults in the northern Campos Basin, offshore Brazil

open access: yesBasin Research, 2021
The rift phase of the Campos Basin developed during the Early Cretaceous on a heterogeneous crust comprising structures inherited from the Brasiliano‐Pan African tectonic events, mostly generated during the Neoproterozoic‐Cambrian amalgamation of western
M. Strugale, R. Schmitt, J. Cartwright
semanticscholar   +1 more source

Geology of the southern Gran Paradiso Massif and Lower Piedmont Zone contact area (middle Ala Valley, Western Alps, Italy)

open access: yesJournal of maps, 2021
This work presents the structural evolution of a poorly studied key-area in the middle Ala Valley, Western Alps, where two tectono-metamorphic units are exposed.
F. Caso   +3 more
semanticscholar   +1 more source

Evidence from Rb–Sr mineral ages for multiple orogenic events in the Caledonides of Shetland, Scotland [PDF]

open access: yes, 2015
Shetland occupies a unique central location within the North Atlantic Caledonides. Thirty-three new high-precision Rb–Sr mineral ages indicate a polyorogenic history.
Bird, A. F.   +3 more
core   +3 more sources

A bigger splat: The catastrophic geology of a 1.2-b.y.-old terrestrial megaclast, northwest Scotland

open access: yesGeology, 2020
Rockfalls are relatively little described from the ancient geological record, likely due to their poor preservation potential. At Clachtoll, northwest Scotland, a megaclast (100 m × 60 m × 15 m) of Neoarchean Lewisian gneiss with an estimated mass of ...
Z. Killingback, R. Holdsworth
semanticscholar   +1 more source

The Rwenzori Mountains, a Paleoproterzoic crustal shear belt crossing the Albertine rift system [PDF]

open access: yes, 2015
This contribution discusses the development of the Paleoproterozoic Buganda-Toro belt in the Rwenzori mountains and its influence on the western part of the East African Rift System in Uganda.
Aanyu, K.   +6 more
core   +1 more source

Quaternary rupture of a crustal fault beneath Victoria, British Columbia, Canada [PDF]

open access: yes, 2017
The seismic potential of crustal faults within the forearc of the northern Cascadia subduction zone in British Columbia has remained elusive, despite the recognition of recent seismic activity on nearby fault systems within the Juan de Fuca Strait.
Amos, Colin   +4 more
core   +1 more source

Structural geology of the Fuegian Andes and Magallanes fold-and-thrust belt - Tierra del Fuego Island

open access: yesGeologica Acta, 2008
A synthesis of the structural geology of the Tierra del Fuego Island, which integrates a new data set derived from field surveys and literature data of the last few years, is presented here. The main geological features of the region developed during the
M. MENICHETTI, E. LODOLO, A. TASSONE
doaj   +1 more source

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