Results 41 to 50 of about 953 (179)
ABSTRACT The Carnac alignments in Morbihan (France) are among the most famous Neolithic sites of the world. Paradoxically, they have benefited little from a thorough renewal of archaeological data over the past century. There are many reasons for this, but it is mainly because the site has been regarded more as a monument to visit and protect than as ...
Guillaume Bruniaux +6 more
wiley +1 more source
The Central Iberian Zone (CIZ) hosts several mafic suites showing variable geochemical affinities and signatures evolving through time. To provide a better understanding of magmatic processes, possible sources and the temporal evolution of the mafic ...
Campos-Rodríguez Héctor R. +11 more
doaj +1 more source
Île Dumet (Armorican Massif, France) and its glaucophane eclogites: the little sister of Île de Groix [PDF]
Blueschist-facies rocks are scarce within the Variscan orogen. Two main occurrences are known in the Armorican Massif (NW France), at Île de Groix and Bois-de-Céné.
G. Godard +5 more
doaj +1 more source
Long‐Term Storage of Meteoric Water in the Variscan Basement: Stable Isotope Constraints (δD–δ18O)
ABSTRACT F‐Ba‐Pb‐Zn (±Ag) deposits near the unconformity between the Armorican and Aquitaine basins formed by mixing surface waters and brines with fluid ascending from the basement. To better constrain the source of this fluid and the conditions of mixing, we analyzed the hydrogen (δDwater) and oxygen (δ18Owater) isotopic composition of water trapped ...
Loïc Bouat +2 more
wiley +1 more source
Valleys are rarely studied as specific relief elements. We propose a typology based on morphological data processing from a digital elevation model (DEM).
Ziad Alhaskeer +3 more
doaj +1 more source
Dating C/S Structures in Syntectonic Granites by In Situ Rb‐Sr Analyses on Muscovite
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
International audienceThe Armorican Massif is an outcropping Variscan basement located in Western France. The age of its exhumation is debated, as most of the outcropping European basements: Is this relief a remnant of the planation of the Variscan Belt ...
Guillocheau, François +4 more
core +1 more source
Abstract The Late Cretaceous witnessed numerous transgression–regression sequences and the onset of a global cooling phase at the start of the Campanian. In the European archipelago, these environmental changes, combined with active plate tectonics, facilitated the formation of ephemeral land bridges that served as dispersal routes for a variety of ...
Olivier Jansen +5 more
wiley +1 more source
In abandoned quarries of massive rocks, the aridity and oligotrophic character of soils, combined with the presence of rock walls and water bodies in the deeper excavations, are favourable to the expression of a renewed, original biodiversity.
François Bétard
doaj +1 more source
16 pagesInternational audienceThe genus Neseuretus Hicks, 1873 is the most abundant trilobite of the Ordovician siltite succession of the Andouill'e and Traveusot Formations in the French Armorican massif. The systematics of some species of Neseuretus is
Paris, Florentin +9 more
core +1 more source

