Results 141 to 150 of about 953 (179)

Metallogeny of the Armorican Massif

1994
Successive metallogenic episodes, spread over several hundred million years in the Armorican Massif, can be related to the following major events (Chauris and Guigues 1969; Chauris 1980): 1. The Cadomian orogeny (southward subduction under the old Icartian continent) with volcanosedimentary and hydrothermal-sedimentary formations (Brioverian ...
L. Chauris, E. Marcoux
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CARADOC BRACHIOPODS FROM THE ARMORICAN MASSIF (NORTHWESTERN FRANCE)

Journal of Paleontology, 2007
Lower Caradoc rhynchonelliformean brachiopods have been recovered from the uppermost part of the Postolonnec Formation and the base of the Kermeur Formation (Upper Aurelucian-lowermost Burrelian) below and above a significant oolitic ironstone bed in the Veryarc'h section, Armorican Massif, France. A new species, Tenuiseptorthis loii n. sp.
A. BOTQUELEN, M. MÉLOU
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The Brioverian (Upper Proterozoic) and the Cadomian orogeny in the Armorican Massif

Geological Society, London, Special Publications, 1990
Abstract The Brioverian in Brittany has generally been divided into the volcanogenic Lower Brioverian and the detrital Upper Brioverian, representing respectively the first and second episodes of the Cadomian orogeny, Cadomian I and Cadomian II.
D. Rabu, J. Chantraine, J. J. Chauvel, E. Denis, P. Balé, Ph. Bardy   +5 more
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Temporary Array Data for Studying Seismic Anisotropy of Variscan Massifs – The Armorican Massif, French Massif Central And Bohemian Massif

Studia Geophysica et Geodaetica, 2000
We present the first results of a comparison of deep lithosphere structure of three Variscan massifs - the Armorican Massif, French Massif Central and Bohemian Massif, as revealed by recent tomographic studies of seismic anisotropy. The data originate from several field measurements made in temporary arrays of stations equipped with both short-period ...
Jaroslava Plomerová, Michel Granet, Sebasten Judenherc, Ulrich Achauer, Vladislav Babuška, Petr Jedlička, Daniel Kouba, Luděk Vecsey   +7 more
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Study of a few palaeozoic ignimbrites in the armorican massif and in the central Massif, France

Bulletin Volcanologique, 1972
A detailed study of the petrographical characteristics of the acid palaeovolcanic formations in the Armorican Massif and in part of the Central Massif (France) reveals important ignimbritic provinces ranging from Precambrian to Carboniferous age. Close comparisons show that the ignimbrites, though varied in the details, form a whole which has constant ...
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Intracontinental Hercynian Events in the Armorican Massif

1994
In the Armorican Massif, at the end of the Devonian, all the oceanic spaces are closed and the collision process has already started.
J. Rolet, F. Gresselin, P. Jegouzo, P. Ledru, R. Wyns   +4 more
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The Cadomian orogeny in the North Armorican Massif: a brief review

Geological Society, London, Special Publications, 1990
The North Armorican Massif (NAM) of NW France is the type locality of the late Precambrian Cadomian orogenic belt. The NAM largely escaped reworking during the Upper Palaeozoic Variscan cycle, with the result that earlier geological relationships are commonly preserved intact. A large part of the Cadomian belt of the NAM comprises variably deformed and
R. S. D’Lemos, R. A. Strachan, C. G. Topley   +2 more
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Cambrian of the Armorican Massif

1994
In the Armorican Massif, Cambrian rocks outcrop in the northeast (Normandy and Maine provinces) and to a lesser extent in the south (Vendee province). Brittany was mostly emerged and was only covered during the Arenig or pre-Arenig transgression. This partition roughly reflects the paleogeography (Fig.3).
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Eo-Hercynian Events in the Armorican Massif

1994
Eo-Hercynian events (i. e., significant deformation and metamorphism prior to strike-slip movements along transcurrent shear zones) are known only in the South-Armorican domain and in the Leon area (Fig.1).
M. Ballèvre, J. Marchand, G. Godard, J.-C. Goujou, Jean Christian, R. Wyns   +5 more
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Carboniferous of the Armorican Massif

1994
Following the Bretonian (post-Famennian II) oro-genic activity, sedimentary basins developed in response to dextral strike-slip faults (Villey 1978; Rolet 1984) in the Laval, Montmartin, Menez Belair, Morlaix, Châteaulin, Saint-Julien-de-Vouvantes and Ancenis areas (Fig. 18).
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