Gargaf Gr
Period:
Ordovician, Cambrian
Age Interval:
Fortunian – Sandbian, Lb2
Province:
Libya
Type Locality and Naming
Upward succession of the Hasawnah Fm, Hawaz Fm, Melaz Shuqran Fm
Column: Fezzan Basin
Synonym: Qarqaf Gr
Lithology and Thickness
Hasawnah Fm (sandstone; spanning the majority of the Group), Hawaz Fm (fine-grained sandstone), Melaz Shuqran Fm (siltstone)
Lithology Pattern:
Sandstone
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as basement
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Memouiat Fm
Regional extent
GeoJSON
null
Fossils
Age
Fortunian – Sandbian
Age Span:
Beginning stage:
Fortunian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
538.80
Ending stage:
Sandbian
Fraction up in the ending stage:
1.0
Ending date (Ma):
452.75
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.