Bakhtiari Fm

Period:

Neogene

Age Interval:

Tortonian – Pleistocene, Sr1, Ir (1,3), UAE1

Province:
Syria, Iran, United Arab Emirates

Type Locality and Naming

Column: Syria, Column: Zagros sedimentary basin (general), Column: Iran East, Column: United Arab Emirates

Synonym: Bakhtiyari Fm (spelled different in paper)

Lithology and Thickness

Syria: ~2000m thick, this formation consists of beds 3-12m thick of reddish-brown, grey, and grey-purple sandstones which are often cross-bedded. Coarse-grained, with beds of conglomerate and pebbles.

Iran: Conglomerate. Lower third consists of alternating massive, resistant conglomerate, and, relatively low-weathering, strongly lensing, conglomeratic sandstone and gritstone. Upper two-thirds consist of massive, cliff-forming conglomerate with a thin central unit of less resistant gritstone. Constituents are rounded pebbles and cobbles of Oligocene, Eocene and Cretaceous limestones and cherts firmly held in a matrix of sand, grit, and, calcareous cement. The chert generally is dark ferruginous brown. Approximately 1800 feet thick.

Lithology Pattern:

Coarse-grained sandstone

Relationships and Distribution

Lower contact

Regionally, the schematic strat column indicates the next older unit as Upper Fars Fm. In Iran it is Upper Red Fm

Upper contact

This is the youngest unit in Syria, United Arab Emirates and Iran

Regional extent

GeoJSON

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Fossils

Not fossiliferous.

Age

Tortonian – Pleistocene

Age Span:

Beginning stage:

Tortonian

Fraction up in beginning stage:

0.1

Beginning date (Ma):

11.19

Ending stage:

Calabrian

Fraction up in the ending stage:

0.0

Ending date (Ma):

1.80

Depositional setting

Depositional pattern:

Additional Information

Compiler:

From Middle East Geological Timescale 2008 Al-Husseini, Journal of Middle East Petroleum Geosciences v 13, no. 4. Syrie Interieure pg. 188-189.