Marar Fm
Period:
Carboniferous
Age Interval:
Tournaisian – Visean, Lb2
Province:
Libya
Type Locality and Naming
Column: Fezzan Basin
Synonym:
Lithology and Thickness
Cycles of silty green-grey claystone, micaceous siltstones, and feldspathic-quartz sandstones. Cross-bedding and ripple marks are common, and there is usually a conglomerate at the base.
Lithology Pattern:
Sandy_claystone
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Awaynat Wanin Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Dome of Collenia Beds Fm
Regional extent
GeoJSON
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Fossils
Fossils of large mounds of red and purple stromatolitic alga common throughout the unit.
Age
Tournaisian - Visean
Age Span:
Beginning stage:
Tournaisian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
359.30
Ending stage:
Visean
Fraction up in the ending stage:
0.5
Ending date (Ma):
338.54
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.