Wan Kasa Fm
Period:
Devonian
Age Interval:
Emsian – Eifelian, Lb2
Province:
Libya
Type Locality and Naming
Column: Fezzan Basin
Synonym:
Lithology and Thickness
Marine transgressive sequence, this formation is composed of alternating grey to reddish ferruginous siltstones to shales, with thin layers of gypsum. The siltstones and sandstones coarsen upward into massive-bedded sandstone at the top.
Lithology Pattern:
Coarse-grained sandstone
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Tadrart Sandstone Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Awaynat Wanin Fm
Regional extent
GeoJSON
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Fossils
Age
Emsian – Eifelian
Age Span:
Beginning stage:
Emsian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
410.51
Ending stage:
Eifelian
Fraction up in the ending stage:
1.0
Ending date (Ma):
385.30
Depositional setting
Depositional environment was tide-controlled sediment-laden sub-tidal currents to tidal flats (transgressive).
Depositional pattern:
Additional Information
Compiler:
Chart derived from: USGS Correlation Chart and Columnar Section for Rocks in Libya, 1963. Descriptions from: Hallet, Don: Petroleum Geology of Libya, 2002.