Assedjefar Fm
Period:
Carboniferous
Age Interval:
Early Pennsylvanian (Bashkirian), Lb2
Province:
Libya
Type Locality and Naming
Column: Fezzan Basin
Synonym:
Lithology and Thickness
Limestone. Incomplete and truncated cycles of shaley limestones, siltstones, and cross-bedded sandstones with occasional conglomeratic intervals.
Lithology Pattern:
Limestone
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Dome of Collenia Beds Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Dimbabah Fm
Regional extent
GeoJSON
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Fossils
Fossiliferous, containing faunal remnants of brachiopods, pelecypods, coral, and foraminifera.
Age
Early Pennsylvanian (Bashkirian). USGS Chart places this unit at the base of the Namurian, base of the Pennsylvanian.
Age Span:
Beginning stage:
Bashkirian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
323.40
Ending stage:
Bashkirian
Fraction up in the ending stage:
1.0
Ending date (Ma):
315.15
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.