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The Uplift of Armorica and the Bretonian Movements of the Variscan Orogeny‐New Insights From Detrital Zircons in the Early Carboniferous Terrigenous Rocks of the Laval Basin (Armorican Massif, France)

Geochemistry, Geophysics, Geosystems
In the French Armorican Massif, the Bretonian phase of the Variscan orogeny has been defined by the Late Devonian (Famennian‐Frasnian) erosion gap, and the Early Carboniferous (Tournaisian) syntectonic terrigenous deposits of the l’Huisserie formation in
Wei Lin, Michel Faure, Lingtong Meng
doaj   +2 more sources

Biogeographical Distribution of River Microbial Communities in Atlantic Catchments. [PDF]

Environ Microbiol Rep
We discovered different factors affecting river microbial communities (RMC) diversity and composition across Atlantic catchments in Europe. Prokaryote diversity was mainly influenced by topography and geology, while eukaryotic groups were driven by land use and cover.
Goldenberg-Vilar A, Morán-Luis M, Vieites DR, Álvarez-Martínez JM, Silió A, Mony C, Varandas S, Monteiro SM, Burgess D, Cabecinha E, Barquín J.   +10 more
europepmc   +2 more sources

First report of the mitrate Mitrocystella (Echinodermata, Stylophora) in the Middle Ordovician of the Crozon Peninsula, Brittany (France) [PDF]

Estonian Journal of Earth Sciences, 2023
The mid-Ordovician mitrocystitid mitrate Mitrocystella incipiens was one of the most widespread stylophorans in the high latitude Mediterranean Province, with occurrences in the Armorican Massif (France), the Iberian Peninsula (Portugal and Spain) and ...
Maxime Renaud, Bertrand Lefebvre, Denis Bailliot, Marie-Noëlle Bailliot, Sophie Coat, Christian Gaudu†, Muriel Vidal   +6 more
doaj   +1 more source

Petrological study of an eclogite-facies metagranite from the Champtoceaux Complex (La Picherais, Armorican Massif, France) [PDF]

European Journal of Mineralogy, 2023
The high-pressure metagranite of La Picherais belongs to the Cellier Unit (part of the lower allochthon of the Champtoceaux Complex; Armorican Massif, western France), where it crops out as an undeformed body embedded within the orthogneisses of the ...
T. Gyomlai, P. Yamato, P. Yamato, G. Godard   +3 more
doaj   +1 more source

Timescales of regional circulation of saline fluids in continental crystalline rock aquifers (Armorican Massif, western France) [PDF]

Hydrology and Earth System Sciences, 2015
In 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 are not understood.
A. Armandine Les Landes, L. Aquilina, P. Davy, V. Vergnaud-Ayraud, C. Le Carlier   +4 more
doaj   +1 more source

Reconstructing the Variscan Terranes in the Alpine Basement: Facts and Arguments for an Alpidic Orocline

Geosciences, 2022
The existence of pieces of the Variscan belt in the Alpine basement has been acknowledged for a long time but the correlation of these massifs to the litho-tectonic domains established in Western Europa outside the Alpine chain is still disputed.
Michel Faure, Jacky Ferrière
doaj   +1 more source

Cyclostratigraphy of the Middle to Upper Ordovician successions of the Armorican Massif (western France) using portable X-ray fluorescence [PDF]

Geochronology, 2022
To expand traditional cyclostratigraphic numerical methods beyond their common technical limitations and apply them to truly deep-time archives, we need to reflect on the development of new approaches to sedimentary archives that are not traditionally ...
M. Sinnesael, M. Sinnesael, M. Sinnesael, A. Loi, M.-P. Dabard, T. R. A. Vandenbroucke, P. Claeys   +6 more
doaj   +1 more source

Eocambrian?Cambrian palaeomagnetism of the Armorican Massif, France [PDF]

Geophysical Journal International, 1980
In an attempt to clarify pre-Hercynian continental configurations, palaeomagnetic data were collected from the spilites de Paimpol (640 ± 12 Myr), the diorite de St Quay (583 ± 40 Myr), the gabbro de Keralain (undated), the granite de Port-Scarff (557 ± 16 Myr), the rhyolitic ignimbrites of Lézardrieux (546 ± 8 Myr) and the rhyolites de St Germain-le ...
Hagstrum, Jonathan T., Voo, Rob Van der, Auvray, Bernard, Bonhommet, Norbert   +3 more
openaire   +3 more sources

Tl-rich pyrite and Sb-rich melnikovite in Montlouis pyrite veins (central armorican domain, Janze, Ille-et-Vilaine; France)

Comptes Rendus. Géoscience, 2022
Lower Ordovician sandstones of the “Grès Armoricain” formation in the Montlouis quarry near Janzé (Ille-et-Vilaine, France) display rare Fe-sulfide veins filled with a low-$T$ $({
Lorand, Jean-Pierre, Pont, Sylvain
doaj   +1 more source

Echinoderm Lagerstätten from high-latitude Gondwana – filling the gap in the Ordovician diversification of the phylum [PDF]

Estonian Journal of Earth Sciences, 2023
The phylum Echinodermata is a major component of marine ecosystems since the first appearance of echinoderms in the Cambrian. Like other metazoan phyla, echinoderms underwent two major evolutionary pulses in early Palaeozoic times: the Cambrian Explosion
Martina Nohejlová, Christophe Dupichaud, Bertrand Lefebvre, Elise Nardin, Farid Saleh   +4 more
doaj   +1 more source