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SenegalBasin Jurassic Platform Formation

SenegalBasin Jurassic Platform Fm

Period:

Jurassic

Age Interval:

Hettangian-Tithonian

Province:
Senegal Basin

Type Locality and Naming

This is only an INFORMAL NAME to enable a Lexicon entry.

Diana-Malari (DM–1) and Kolda (KO–1) wells (Brownfield and Charpentier, 2013).

Synonym:

References: Brownfield and Charpentier, 2003

[Fig. 1. Generalized map of the central and southern parts of the Senegal Basin showing part of the Senegal Province, the Mauritania, Northern, and Casamance subbasins, the Mesozoic carbonate platform edge, the northern and southern salt basins, the Mauritanide Mountains, the Bové Basin, Deep Sea Drilling Project sites 367 and 368, the 2-second sediment isopach, and the onshore depth to basement isopachs (Brownfield and Charpentier, 2003)]

[Fig. 2: Generalized stratigraphic column for the Northern subbasin and the southern part of the Mauritania subbasins (Brownfield and Charpentier, 2003).]

Lithology and Thickness

Up to 2000 m of carbonate platform. It overlies a ca. 100 m interval of sandstone that caps the underlying Triassic evaporites (Brownfield and Charpentier, 2003).

Lithology Pattern:

Reef limestone

Relationships and Distribution

Lower contact

It conformably(?) overlies the SenegalBasin Salt Fm

Upper contact

It is conformably overlain by the SenegalBasin Neocomian Fm

Regional extent

Senegal, Mauritania, Senegal, The Gambia, and Guinea-Bissau, Northwest Africa

GeoJSON

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Fossils

Age

entire Jurassic

Age Span:

Beginning stage:

Hettangian

Fraction up in beginning stage:

0.00

Beginning date (Ma):

201.36

Ending stage:

Tithonian

Fraction up in the ending stage:

1.0

Ending date (Ma):

143.10

Depositional setting

Depositional pattern:

Additional Information

Compiler:

Enam O. Obiosio, Solomon Joshua Avong, Henry Nasir Suleiman, Rebecca Bobick (and Wen Du), modified from Brownfield, M.E. and Charpentier, R.R., 2003. "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, 1-26.