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Geli Khana Formation
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Geli Khana Fm base reconstruction

Geli Khana Fm

Period: 
Triassic

Age Interval: 
Anisian – Ladinian, Iq (2,4)


Province: 
Iraq

Type Locality and Naming

Column: Central Iraq, Column: N Iraq

Synonym:


Lithology and Thickness

In type section it comprises two subdivisions. The upper division comprises dark, massive dolomites overlying thick-bedded limestones with subordinate marl and shale with occasional chert modules. The lower division consists of bluish, greyish, and yellowish shale and thin-bedded limestone with some sandstone beds that increase in amount SW of outcrops. All outcrops in N and NE Iraq are of similar facies and include anhydrite in the lower parts of the formation.


Lithology Pattern: 
Dolomite


Relationships and Distribution

Lower contact

Regionally, the schematic strat column indicates this the oldest unit in Central Iraq

Upper contact

Regionally, the schematic strat column indicates the next younger unit as Kurra Chine Fm with an unconformity

Regional extent


GeoJSON

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Fossils


Age 

Anisian – Ladinian

Age Span: 

    Beginning stage: 
Anisian

    Fraction up in beginning stage: 
0.7

    Beginning date (Ma): 
243.03

    Ending stage: 
Ladinian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
237.00

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."