Gohatsion Fm
Period:
Jurassic
Age Interval:
Bajocian – Bathonian
Province:
Sudan E
Type Locality and Naming
Blue Nile Basin, Southeast Sudan and Northwest Ethiopia. The Gohatsion Formation (the Lower Limestone Member of Jain, 2019) is exposed at Mugher (Jain and Singh, 2019).
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
350m of glauconitic shales with alternation of gypsum (some layers are massive), shale and dolostone. (Jain and Singh, 2019).
Lithology Pattern:
Gypsiferous claystone
Relationships and Distribution
Lower contact
Adigrat Fm, conformable?
Upper contact
Antalo Fm, conformable?
Regional extent
Blue Nile Basin, Southeast Sudan and Northwest Ethiopia
GeoJSON
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Age
Bajocian – ?Bathonian
Age Span:
Beginning stage:
Bajocian
Fraction up in beginning stage:
0.5
Beginning date (Ma):
169.54
Ending stage:
Bathonian
Fraction up in the ending stage:
1.0
Ending date (Ma):
165.29
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.