Ilam Fm
Period:
Cretaceous
Age Interval:
Santonian – Campanian, Ir (1,3)
Province:
Iran
Type Locality and Naming
Column: Zagros belt (general), Column: Iran East
Synonym:
Lithology and Thickness
624 feet of gray, regularly bedded, fine-grained, argillaceous limestone with thin, black, fissile shale partings. Basal bed is silty with large hematite nodules and minor weathering.
Lithology Pattern:
Clayey limestone
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Laffan Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Gurpi Fm
Regional extent
GeoJSON
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Fossils
Age
Santonian – Campanian
Age Span:
Beginning stage:
Santonian
Fraction up in beginning stage:
0.7
Beginning date (Ma):
84.27
Ending stage:
Campanian
Fraction up in the ending stage:
0.13
Ending date (Ma):
82.16
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Middle East Geological Timescale 2008 Al-Husseini, Journal of Middle East Petroleum Geosciences v 13, no. 4. James at. al., 1965, page 2214