Al Uwayliayah Fm
Period:
Paleogene
Age Interval:
Paleocene
Province:
Cyrenaica Basin
Type Locality and Naming
Synonym:
References: Shaltami, O.R., et al. (2020), and Google Gemina (Aug’26)
Lithology and Thickness
Light-grey to greenish open-marine marls and chalky limestones.
Lithology Pattern:
Clayey limestone
Relationships and Distribution
Lower contact
Sitting above a distinct regional unconformity onto the Wadi Dukhan Fm according to Shaltami et al. (2020).
Upper contact
Unconformably overlain by the Tulmithah Fm according to Shaltami et al. (2020).
Regional extent
GeoJSON
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Fossils
Age
Danian through Thanetian according to Shaltami et al. (2020). [For graphic purposes, the extent of the upper and lower unconformities have been omitted here.]
Age Span:
Beginning stage:
Danian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
66.04
Ending stage:
Thanetian
Fraction up in the ending stage:
1.0
Ending date (Ma):
56.00
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.