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GEOREF RECORD

Contribution a l'etude du Couvinien dans le bassin de Fort-de-Polignac (Sahara)

Jean Chaumeau, Philippe Legrand and Alzine Renaud
Contribution a l'etude du Couvinien dans le bassin de Fort-de-Polignac (Sahara)
Bulletin de la Societe Geologique de France (1961) 3 (5): 449-456

Abstract

The contact of lower Devonian sandstone and shaly sandstone with middle Devonian shaly limestone is exposed at several points in the vicinity of Fort-de-Polignac in the Sahara. The lower Devonian beds show large lateral variations. Instead of the Givetian (upper middle Devonian) transgressing the lower Devonian, as previously supposed, the transgression began in the center of the basin in the Couvinian or Eifelian, i.e., lower middle Devonian, spread progressively eastward and westward, and did not reach the Oued Samene area until upper Couvinian. The submergence of the lower part of Tihemboka, west of In Akaouet, did not occur until Frasnian (lower upper Devonian).


ISSN: 0037-9409
Coden: BSGFAE
Serial Title: Bulletin de la Societe Geologique de France
Serial Volume: 3
Serial Issue: 5
Title: Contribution a l'etude du Couvinien dans le bassin de Fort-de-Polignac (Sahara)
Pages: 449-456
Published: 1961
Other Date: 1962
Text Language: French
Publisher: Societe Geologique de France, Paris, France
Accession Number: 1967-001366
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. geol. sketch map
N19°00'00" - N37°00'00", W09°00'00" - E12°00'00"
Source Note: Series 7
Country of Publication: France
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
Update Code: 1967
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