Mugher Fm
Period:
Cretaceous
Age Interval:
Valanginian – Aptian
Province:
Sudan E
Type Locality and Naming
Blue Nile Basin, Southeast Sudan and Northwest Ethiopia
Synonym: Mugher Muddy Sandstone
Reference: Jain and Singh, 2019; Jain et al., 2022
[Fig. 1: General stratigraphy of the Blue Nile basin, with major lithological characteristics and age assignment (from Jain and Singh, 2019).]
Lithology and Thickness
320m thick. Alternation of sandstone, siltstone, and mudstone; with gypsum and dolostone at the bottom, and conglomerate at the top. (Jain and Singh, 2019).
Lithology Pattern:
Fine-grained sandstone
Relationships and Distribution
Lower contact
Upper contact
Regional extent
Blue Nile Basin, Southeast Sudan and Northwest Ethiopia
GeoJSON
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Fossils
Bone beds
Age
Valanginian – Aptian (Jain & Singh, 2019, estimated as Berriasian to Aptian; but uppermost Antalo Limestone includes upper Berriasian according to preprint by Mulugeta, 2025)
Age Span:
Beginning stage:
Valanginian
Fraction up in beginning stage:
0.00
Beginning date (Ma):
137.70
Ending stage:
Aptian
Fraction up in the ending stage:
0.5
Ending date (Ma):
117.30
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Enam O. Obiosio, Solomon Joshua Avong and Henry Nasir Suleiman (2024) - Stratigraphic Lexicon compiled from the following publications:Jain S., Singh A. (2019): First calcareous nannofossil record from the Jurassic strata exposed in the Blue Nile Basin (Ethiopia). Jour. African Earth Sci. 158: 103553.
Jain, S., Mullugetta, M., Benzaggagh, M., Salamon, M. A., & Schmerold, R. (2022). Discovery of chitinoidellids and calpionellids from the Blue Nile Basin and the Jurassic‐Cretaceous boundary in Ethiopia. Cretaceous Research, 132, 105112. https://doi.org/10.1016/j.cretres.2021.105112.