Abu Ghaylan Limestone Tripolitania And Sirte Basin Fm
Period:
Jurassic
Age Interval:
Province:
Libya
Type Locality and Naming
Column: Tripolitania And Sirte Basin
Lithology and Thickness
Abu Ghaylan Limestone Fm LITHOLOGY= Bu (Abu) Ghaylan Limestone Fm - USGS chart places this anhydritic formation at the base of the Lias Stage, at the base of the lower Jurassic. Layers of gypsum and anhydrite interbedded with limestone. Massive gypsum ad anhydrite with interbeds of dolomitic limestone and claystones and variegated shales. Deposited in an enclosed, evaporitic, subsiding basin. Unfossiliferous. CALIBRATION = Base of Lower Jurassic (Hettangian). REFERENCE = Chart derived from: USGS Correlation Chart and Columnar Section for Rocks in Libya, 1963. Descriptions from: Hallet, Don: Petroleum Geology of Libya, 2002.
Lithology Pattern:
Gypsum-Anhydrite
Relationships and Distribution
Lower contact
Upper contact
Regional extent
GeoJSON
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Fossils
Age
Age Span:
Beginning stage:
Hettangian
Fraction up in beginning stage:
0
Beginning date (Ma):
201.36
Ending stage:
Oxfordian
Fraction up in the ending stage:
0
Ending date (Ma):
161.53
Depositional setting
Depositional pattern:
Additional Information
long: 19 lat: 29
Compiler: