Coralliaires, brachiopodes et crinoides mesodevoniens du Sahara mauritanien et occidental

1940 ◽  
Vol S5-X (7-9) ◽  
pp. 187-200
Author(s):  
Jean Cottreau
Keyword(s):  
West Africa ◽  
Middle Devonian ◽  
Sahara Desert ◽  
French West Africa ◽  
Western Sahara

Abstract Describes corals, brachiopods, and crinoids from middle Devonian localities of the Sahara desert in Mauritania, French West Africa, and the western Sahara in French Sudan (French West Africa) and Algeria.

Les formations a stromatolithes dans le Sahara occidental

1946 ◽  
Vol S5-XVI (7-9) ◽  
pp. 451-461 ◽  
Author(s):  
Nicolas Menchikoff
Keyword(s):  
West Africa ◽  
Homogeneous Group ◽  
French West Africa ◽  
Western Sahara

Abstract Dolomitic limestones containing abundant stromatolites at the base of the Paleozoic sedimentary series of the Taoudenni syncline in the western Sahara (French West Africa) are Cambrian in age. The stromatolites are calcareous concretions whose formation was due to the action of algae and possibly also of bacteria. In the case of Collenia, genera and species refer to the structure formed, not to the organism responsible for the formation. Forms assigned to Conophyton exhibit a regularity indicating a homogeneous group, which may be of stratigraphic significance.

Nouvelles observations sur le "Cambro-Ordovicien" du Zemmour (Sahara occidental)

1956 ◽  
Vol S6-VI (1-3) ◽  
pp. 99-113 ◽  
Author(s):  
Jean Sougy
Keyword(s):  
West Africa ◽  
The South ◽  
French West Africa ◽  
Western Sahara ◽  
The North

Abstract In the Zemmour region (northern Mauritania, French West Africa) of the western Sahara, beds assigned to the Cambro-Ordovician are apparently transgressive toward the north-northeast, for dolomitic limestones are found only in the south and west. Observations in the Oumat el Ham massif show that there are two distinct series in the sequence, the marine Oumat el Ham series, overlain discordantly by the continental Garat el Hammoueid series. A conglomerate containing pebbles of the uppermost beds of the Oumat el Ham usually marks the disconformity.

The role of bryozoans in fossil reefs—an example from the Middle Devonian of the Western Sahara

Facies ◽  
2008 ◽  
Vol 54 (4) ◽  
pp. 613-620 ◽  
Author(s):  
Andrej Ernst ◽  
Peter Königshof
Keyword(s):  
Middle Devonian ◽  
Western Sahara
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