Tadrart Sandstone Fm
Period:
Devonian
Age Interval:
Lochkovian – Pragian, Lb2
Province:
Libya
Type Locality and Naming
Column: Fezzan Basin
Synonym:
Lithology and Thickness
Massive continental to marginally-marine, cross-bedded sandstones with plant fossils found throughout the lower unit and trace fossils in the top unit.
Lithology Pattern:
Sandstone
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Akakus Sandstone Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Wan Kasa Fm
Regional extent
GeoJSON
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Fossils
Age
Lochkovian – Pragian. USGS Chart places this formation at the base of the Lower Devonian, in the Siegenian stage.
Age Span:
Beginning stage:
Lochkovian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
419.00
Ending stage:
Pragian
Fraction up in the ending stage:
1.0
Ending date (Ma):
410.51
Depositional setting
Depositional environment ranges from subtidal to intertidal and continental.
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.