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SenegalBasin Neocomian Formation
Click to display on map of the Ancient World at:
SenegalBasin Neocomian Fm base reconstruction

SenegalBasin Neocomian Fm


Period: 
Cretaceous

Age Interval: 
Berriasian-Barremian


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

400 to 1200 m of an outer carbonate platform and an inner clay-sandstone shelf (Brownfield and Charpentier, 2003).


Lithology Pattern: 
Sandy limestone


Relationships and Distribution

Lower contact

It conformably overlies the SenegalBasin Jurassic Platform Fm

Upper contact

It is conformably overlain by the SenegalBasin Mid-Cret Fm

Regional extent

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


GeoJSON

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Fossils


Age 

Early Cretaceous (Berriasian-Barremian

Age Span: 

    Beginning stage: 
Berriasian

    Fraction up in beginning stage: 
0.00

    Beginning date (Ma): 
143.10

    Ending stage: 
Barremian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
121.40

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.