Pirada Shale Fm
Period:
Cambrian
Age Interval:
Province:
Senegal Basin
Type Locality and Naming
Synonym:
Lithology and Thickness
The Cambrian sedimentary section is as much as 1,250 m thick and contains three units: the Pirada Shale, the Cantari Shale, and the Caium Sandstone.
Lithology Pattern:
Claystone
Relationships and Distribution
Lower contact
Metamorphic Rocks
Upper contact
Cantari Shale Fm (conformable)
Regional extent
Senegal Province, Mauritania, Senegal, The Gambia, and Guinea-Bissau, Northwest Africa
GeoJSON
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Fossils
Age
Age Span:
Beginning stage:
Fortunian
Fraction up in beginning stage:
0
Beginning date (Ma):
538.80
Ending stage:
Fortunian
Fraction up in the ending stage:
0.53
Ending date (Ma):
533.61
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Rebecca Bobick (and Wen Du), modified from Brownfield, M.E. and Charpentier, R.R., "Assessment of the Undiscovered Oil and Gas of the Senegal Province, Mauritania, Senegal, The Gambia, and Guinea-Bissau, Northwest Africa", U.S. Geological Survey Bulletin 2207-A, posted online October 2003