Results 11 to 20 of about 2,939 (195)

A late-Ordovician phreatomagmatic complex in marine soft-substrate environment: The Crozon volcanic system, Armorican Massif (France) [PDF]

open access: yesJournal of Volcanology and Geothermal Research, 2009
International audienceThe mafic lavas and the diabases of Crozon (Armorican Massif, France), belong to an anorogenic Ordovician volcanic complex, emplaced on a rifted passive margin in North Gondwana.
Bénard, Antoine   +3 more
core   +3 more sources

Géohistoire du massif forestier d’Écouves (Orne, Normandie)

open access: yesProjets de Paysage, 2020
Situated at the limits of the Armorican Massif and the Paris Basin, the Écouves Forest, due to its topography, its diachronic evolution and its special bio-pedological characteristics, differs from the corpus of forests found on plains and plateaus ...
Nicolas Blanchard   +2 more
doaj   +1 more source

Interpreting transfers of rocks during the Mesolithic in the West of France

open access: yesJournal of Lithic Studies, 2020
The crystalline geological substratum of the Armorican Massif, in the West of France, is devoid of flint nodules in primary position. As a result, during Prehistory, humans developed different strategies for making their toolkits, either by adapting ...
Gregor Marchand
doaj   +1 more source

Variscan sourcing of Westphalian (Pennsylvanian) sandstones in the Canobie Coalfield, UK [PDF]

open access: yes, 2010
The zircon age spectrum in a sample from the Canonbie Bridge Sandstone Formation (Asturian) of southern Scotland contains two main peaks. One is Early Carboniferous in age (348– 318 Ma), and corresponds to the age of igneous activity during the ...
ANDREW MORTON   +21 more
core   +1 more source

Fusiform axes and geochemical analyses: two new avenues of research for the study of Neolithic axes in dolerite

open access: yesGallia Préhistoire, 2018
This paper reassesses polished spindle-shaped or long axes with round cross-sections, found between the end of the 19th century and the present time, following the discovery of axe fragments in a dated Middle Neolithic II context in Lower Normandy.
Antoine Chancerel   +4 more
doaj   +1 more source

Haches fusiformes et analyses géochimiques : deux nouvelles pistes pour l’étude des haches néolithiques en dolérite

open access: yesGallia Préhistoire, 2018
This paper reassesses polished spindle-shaped or long axes with round cross-sections, found between the end of the 19th century and the present time, following the discovery of axe fragments in a dated Middle Neolithic II context in Lower Normandy.
Antoine Chancerel   +4 more
doaj   +1 more source

Magmatic and hydrothermal behavior of uranium in syntectonic leucogranites: The uranium mineralization associated with the Hercynian Guérande granite (Armorican Massif, France) [PDF]

open access: yes, 2017
Most of the hydrothermal uranium (U) deposits from the European Hercynian belt (EHB) are spatially associated with Carboniferous peraluminous leucogranites.
Ballouard, C.   +10 more
core   +3 more sources

Axe Production and Exchange in the Seine Valley (France)

open access: yesInternet Archaeology, 2009
The particular aim of this article is to examine territories and the role of lithic raw material extraction and production sites in the Seine basin during the Neolithic.
François Giligny   +6 more
doaj   +1 more source

Discussion on a new model for the Hercynian Orogen of Gondwana France and Iberia by D. Shelley & G. Bossière. [PDF]

open access: yes, 2002
In spite of numerous studies, the geodynamic evolution of the Hercynian Orogeny of Western Europe is still controversial. In a recent paper, Shelley and Bossière (2000) propose that the Hercynian Orogeny in Iberia and France was a ‘collage' of distinct ...
Cartier, Carine   +2 more
core   +3 more sources

Time scales of regional circulation of saline fluids in continental aquifers (Armorican massif, Western France) [PDF]

open access: yes, 2014
International audienceIn recent decades, saline fluids have been sampled worldwide at great depths in continental basements. Although some of them have been attributed to marine transgressions the mechanisms allowing their circulation is not understood ...
Aquilina, Luc   +4 more
core   +3 more sources

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