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SenegalBasin Turonian Formation

SenegalBasin Turonian Fm

Period:

Cretaceous

Age Interval:

Turonian

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

The Cenomanian ends with a rapid flooding of the shelf; and the entire Turonian are highstand marls (50 to 120 m) in both distal and proximal settings. The Turonian ends with the beginning of a regression.

Lithology Pattern:

Pelagic marl

Relationships and Distribution

Lower contact

It conformably overlies the SenegalBasin Mid-Cret Fm

Upper contact

It is conformably overlain by the SenegalBasin Paleogene Fm

Regional extent

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

GeoJSON

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Fossils

Age

Turonian

Age Span:

Beginning stage:

Turonian

Fraction up in beginning stage:

0.00

Beginning date (Ma):

93.90

Ending stage:

Turonian

Fraction up in the ending stage:

1.0

Ending date (Ma):

89.39

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.