Al Gata Chalk Fm
Period:
Paleogene
Age Interval:
Lutetian, Lb1
Province:
Libya
Type Locality and Naming
Lithology and Thickness
Highly variable lithology, from marls, clays, gypsums to fossiliferous limestone. Quartz geodes present in the Wadi Bu ash Shaykh region.
Lithology Pattern:
Shallow-marine marl
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Jabal Wadden Gr (Gir Gypsum Fm)
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Tmed al Ksour Fm
Regional extent
GeoJSON
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Fossils
Age
Lutetian
Age Span:
Beginning stage:
Lutetian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
48.07
Ending stage:
Lutetian
Fraction up in the ending stage:
0.5
Ending date (Ma):
44.55
Depositional setting
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.