Nupe Gr

Cenozoic

Cretaceous

Neoproterozoic

Information provided by geoscience team at Ahmadu Bello University, Zaria, Nigeria --see About

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Nupe Gr

Period:

Cretaceous

Age Interval:

Upper Cretaceous (Maastrichtian)

Province:
Bida Basin- South, Bida Basin- North and Central

Type Locality and Naming

The Nupe Gr comprises the Campanian-Maastrichtian successions in both the North and South Bida Basin (Obaje, 2009). The alternative name for Bida basin (or Mid-Niger Basin) is the Nupe Basin. In north Bida, it is the upward succession of the Bida Sandstone Fm, Sakpe Ironstone Fm (Sakpe Fm), Enagi Siltstone Fm and Batati Ironstone Fm. In south Bida, it is the upward succession of the Lokaja Fm (Lokaja Sandstone Fm), Patti Fm and Agbaja Ironstone Fm.

[Fig. 1 Stratigraphic successions in the Mid-Niger Basin (also known as Bida or Nupe Basin)]

Lithology and Thickness

See individual formations. In general, Campanian sandstone, then Maastrichtian oolitic-ironstone and/or siltstone.

Lithology Pattern:

Clayey sandstone

Relationships and Distribution

Lower contact

Overlies Precambrian or early Paleozoic metamorphic basement

Upper contact

overlain by Quaternary alluvial deposits, laterites, or soils, indicating a significant gap in the geological record.

Regional extent

Southern Bida Basin

GeoJSON

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Fossils

See individual formations

Age

Late Cretaceous (Campanian through Maastrichtian; with assumed gap at K/T boundary)

Age Span:

Beginning stage:

Campanian

Fraction up in beginning stage:

0.25

Beginning date (Ma):

80.78

Ending stage:

Maastrichtian

Fraction up in the ending stage:

0.85

Ending date (Ma):

66.96

Depositional setting

Marine

Depositional pattern:

Additional Information

Compiler:

Enam O. Obiosio, Solomon Joshua Avong and Henry Nasir Suleiman (2024)- Stratigraphic Lexicon compiled from the following books:

Nigeria: Its Petroleum Geology, Resources and Potential, by Arthur Whiteman, 1982; (Volume 1) Published by Graham and Trotman Ltd.

A review of the Cretaceous System in Nigeria by P. M. Zaborski (1998) In Africa Geoscience Review, Vol.5, No.4, pp385-483.

Geology and Mineral Resources of Nigeria by Nuhu George Obaje, Published by Springer-Verlag Berlin Heidelberg 2009; http://www.springer.com/series/772.

Geology of Nigeria Sedimentary Basins, Nwajide C. S., 2013; Published by CSS Bookshops Limited, Lagos Nigeria.