Qasr Al Abid Fm
Period:
Cretaceous
Age Interval:
late Cenomanian
Province:
Cyrenaica Basin
Type Locality and Naming
Synonym:
References: Shaltami et al. (2020) and Google Gemina (Aug’26)
Lithology and Thickness
Greenish marls and glauconitic sandstones grading upward into soft clayey limestones
Lithology Pattern:
Shallow-marine marl
Relationships and Distribution
Lower contact
Unconformable onto the Albian strata according to Shaltami et al. (2020), which was named a Daryanah Fm on chart of El Oshebi and Fares, 2026; but the current main one seems to the Bir Hacheim Fm.
Upper contact
Unconformably (lower Turonian is absent) overlain by the Al Baniyah Fm according to Shaltami et al. (2020).
Regional extent
GeoJSON
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Fossils
Age
Upper Cenomanian according to Shaltami et al. (2020).
Age Span:
Beginning stage:
Cenomanian
Fraction up in beginning stage:
0.5
Beginning date (Ma):
97.20
Ending stage:
Cenomanian
Fraction up in the ending stage:
1.0
Ending date (Ma):
93.90
Depositional setting
Depositional pattern:
Additional Information
:
Compiler:
s:Shaltami, O.R., et al. (2020). Petroleum system of the Cyrenaica Basin – A review. In: 1st International Symposium on Geosciences (ISG2020), 21th March 2020, Proceeding Book: published by BR Petrobras. P. 64-71.Tawadros, E.E. (2011). Geology of North Africa. CRC Press (Taylor & Francis Group), 931 pp.Google Gemini (Aug 2026) – assembled synthesis of Cyrenaica Basin units from various web-accessible publications.
El Oshebi, F.M., Fares, F.F. (2026). Stratigraphy, facies, and depositional environments of the Eocene sequence in the Ras Al Hilal area, Cyrenaica, Libya. Arabian Jour. Geosciences, 19:79. https://doi.org/10.1007/s12517-026-12488-2.
El-Hawat, A.S., Abdulsamad, E.O. (2004) Geology and Archeology of Cyrenaica, Northeastern Libya. Field trip guide B01, 32nd International Geological Congress. 36 pp.