Results 161 to 170 of about 2,939 (195)
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Contrasted Occurrence of Eodevonian Stromatolites, Northeastern Armorican Massif, France
1981While revising the Devonian System of the N.E. Armorican Massif, France (Fig. 1) stromatolitic units were first reported by the author (Poncet 1964) in Eodevonian strata (Formation of the Schistes et Calcaires de Nehou, Middle Siegenian in age). Three main types of stromatolites were recognized and will be described here.
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Earth and Planetary Science Letters, 1984
Abstract Paleomagnetic investigations have been conducted on Tournaisian volcanics and sediments from the Laval syncline, in order to evaluate the consequences of the Late Variscan tectonic and thermic phases. On the southern flank of the syncline, anisotropy measurements have yielded maximum susceptibility in the schistosity planes.
Jean-Bernard Edel, Michel Coulon
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Abstract Paleomagnetic investigations have been conducted on Tournaisian volcanics and sediments from the Laval syncline, in order to evaluate the consequences of the Late Variscan tectonic and thermic phases. On the southern flank of the syncline, anisotropy measurements have yielded maximum susceptibility in the schistosity planes.
Jean-Bernard Edel, Michel Coulon
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Palygorskite in The Tertiary Deposits of The Armorican Massif
1984Abstract In the Armorican Massif, palygorskite has been found in Eocene and Oligo-cene deposits, in marine, transitional marine and lacustrine depositional environments. The palygorskite occurs in layers containing either exclusively clays or carbonates (dolomite, or calcite).
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Lower Devonian Hexagonaria (Rugosa) from the Armorican Massif of western France
1969(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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Contrasted Occurrence of Lower Devonian Coated Grains, Northeastern Armorican Massif, France
1983In the northeastern Armorican Massif the Pont-aux-Bouchers Formation (formation d in Fig. 1), which is of Middle to Upper Siegenian age, is truncated by an erosion surface. This formation, although mainly composed of terrigenous detritus (fine sands, shales) includes a locally developed reefal horizon (reefal horizon of Baubigny; Poncet 1968).
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A palaeomagnetic study of two Precambrian-Cambrian dyke swarms from the Armorican Massif
Geological Society, London, Special Publications, 1990Abstract The palaeomagnetic analysis of two dolerite dyke swarms, metamorphosed during the late stages of the Cadomian Orogeny, is reported. The Vazon dyke swarm of Guernsey, Channel Islands, has yielded a characteristic component of magnetization (D = 199°, I = 48°, a95 = 12°, n = 8 dykes) which is dual polarity, while six other sampled ...
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Rivillina, a new ostracode (Bradoriida ?) genus from the Armorican Massif, France
Alcheringa: An Australasian Journal of Palaeontology, 1983Two new species belonging to the new genus Rivillina are described from two Ordovician sites in the Armorican Massif: R. schallreuteri sp. nov.
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Any news from the Icartian in the Armorican Massif in Brittany?
2018The Neoproterozoic terranes throughout the circum-Atlantic (Carolina, Cadomia and Avalon) are considered as the remnants of subduction related magmatic arcs and associated basins developed off the margins of Gondwana. As they are found in very distant regions, establishing correlations between the tectonothermal evolutions for these terranes remains a ...
Poujol, Marc +3 more
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The seismic moment M0, the associated moment magnitude Mw, and the corner frequency fc are essential parameters for earthquake studies and seismic risk management. In the context of stable continental regions (SCRs), remote from active plate boundaries, the assessment of these parameters is made difficult by the low energy release associated with each ...
Marion Alloncle +2 more
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Marion Alloncle +2 more
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