Ms'ad Fm
Period:
Cretaceous
Age Interval:
Cenomanian – Turonian, Iq3
Province:
Iraq
Type Locality and Naming
Column: Rutba Uplift (W Iraq)
Synonym:
Lithology and Thickness
Consists of alternating shallow marine limestone, buff and white chalky limestone, with beds of marl and sand near the base. Originally thought to be 65m thick, but recent surveys of the region indicated that the type section included Campanian sediments, and the thickness of the formation has been reduced to 30m.
Lithology Pattern:
Clayey limestone
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Rutbah Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Hartha Fm
Regional extent
GeoJSON
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Fossils
Age
Cenomanian – Turonian
Age Span:
Beginning stage:
Cenomanian
Fraction up in beginning stage:
0.6
Beginning date (Ma):
96.54
Ending stage:
Turonian
Fraction up in the ending stage:
0.3
Ending date (Ma):
92.55
Depositional setting
Depositional pattern:
Additional Information
Compiler:
From S. Z. Jassim and J. C. Goff, Geology of Iraq, 2006. pg 124, Fig. 11-1: "Stratigraphic correlation of formation of Megasequence AP8."