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

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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