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Bahram Formation
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Bahram Fm base reconstruction

Bahram Fm


Period: 
Devonian

Age Interval: 
Givetian – Frasnian, Ir2


Province: 
Iran

Type Locality and Naming

Column: Central Iran, Middle formation in Ozbak Kuh Gr

Synonym:


Lithology and Thickness

Bluish-gray and black nodular limestones, with marly shale intercalations. Thickness of over 300m, with alternations of dolomite and limestone.


Lithology Pattern: 
Dolomitic limestone


Relationships and Distribution

Lower contact

Regionally, the schematic strat column indicates the next older unit as Sibzar Fm

Upper contact

Regionally, the schematic strat column indicates the next younger unit as Shishtu Fm

Regional extent


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[61.07,35.84],[58.39,36.41],[56.7,36.89],[52.28,35.24],[47.8,37.03],[46.8,36.19],[47.13,34.95],[56.38,28.87],[58.49,28.24],[56.51,34.87],[58.44,35.43],[61,34.96],[61.07,35.84]]]]}}

Fossils


Age 

Givetian – Frasnian

Age Span: 

    Beginning stage: 
Givetian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
385.30

    Ending stage: 
Frasnian

    Fraction up in the ending stage: 
0.7

    Ending date (Ma):  
373.44

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Middle East Geological Timescale 2008 Al-Husseini, Journal of Middle East Petroleum Geosciences v 13, no. 4