Shiranish Fm
Period:
Cretaceous
Age Interval:
Campanian – Maastrichtian, Iq2
Province:
Iraq
Type Locality and Naming
Column: Central Iraq
Synonym:
Lithology and Thickness
Comprises thin bedded clayey limestones (locally dolomitic) overlain by blue pelagic marls. Interfingered with Hartha near the bottom.
Lithology Pattern:
Mixed marine
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Hartha Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Aaliji Fm
Regional extent
GeoJSON
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Fossils
Age
Campanian – Maastrichtian
Age Span:
Beginning stage:
Campanian
Fraction up in beginning stage:
0.8
Beginning date (Ma):
74.47
Ending stage:
Maastrichtian
Fraction up in the ending stage:
0.7
Ending date (Ma):
67.88
Depositional setting
Depositional pattern:
Additional Information
Compiler:
From S. Z. Jassim and J. C. Goff, Geology of Iraq, 2006. pg 141, Fig. 12-1: "Stratigraphic correlation of formations of the Late Early Turonian-Danian Megasequence"