Ar Rajmah Fm
Period:
Neogene
Age Interval:
Tortonian, Lb3
Province:
Libya
Type Locality and Naming
Column: Cyrenaica Basin
Synonym: Regima Fm
Lithology and Thickness
Members include: 1. the basal Binghazi (30m of crystalline, fossiliferous limestones deposited on open-shallow platform), 2. Ash Shulaydimah (Formerly "Sceleidima," which is porous gypsiferous limestone and clays), 3. Masus (hard, crystalline limestone with dolomitic base). and 4. the uppermost Wadi al Qattarah (soft, oolitic limestone with chert nodules).
Lithology Pattern:
Limestone
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Fuehat Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Sahabi Gr
Regional extent
GeoJSON
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Fossils
Age
Tortonian
Age Span:
Beginning stage:
Tortonian
Fraction up in beginning stage:
0.5
Beginning date (Ma):
9.44
Ending stage:
Tortonian
Fraction up in the ending stage:
1.0
Ending date (Ma):
7.25
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.