Ahmadi Fm
Period:
Cretaceous
Age Interval:
Cenomanian, Iq2
Province:
Iraq
Type Locality and Naming
Column: Central Iraq
Synonym:
Lithology and Thickness
Composed of grey shale passing up into green to greenish grey and chocolate brown shale. Up to 160m thick. Thins towards the N to E.
Lithology Pattern:
Claystone
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Mauddud Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Rumalia Fm
Regional extent
GeoJSON
{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[42.42,37.07],[43.76,36.44],[44.08,35.68],[43.17,35.17],[42.06,34.67],[42.05,32.37],[42.7,30.81],[44.68,29.26],[46.51,29.12],[47.22,30.15],[48.23,30.02],[48.38,30.15],[48.02,30.47],[47.99,30.95],[47.67,30.97],[47.84,31.83],[46.46,32.88],[46.07,32.97],[45.39,33.98],[45.79,35.12],[44.62,36],[43.2,37.3],[42.42,37.07]]]]}}
Fossils
Age
Cenomanian
Age Span:
Beginning stage:
Cenomanian
Fraction up in beginning stage:
0.3
Beginning date (Ma):
98.52
Ending stage:
Cenomanian
Fraction up in the ending stage:
0.58
Ending date (Ma):
96.67
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."