Arab Fm

Period:

Jurassic

Age Interval:

Kimmeridgian, Sa (1,2), Bn1, Qa1, UAE1

Province:
Saudi Arabia, Bahrain, Qatar, United Arab Emirates

Type Locality and Naming

Columns: Saudi Arabia Outcrop, Saudi Arabia Subsurface, Bahrain, Qatar, United Arab Emirates. Members: Arab A Reservoir, Arab B Anhydrite, Arab B Reservoir, Arab C Anhydrite, Arab C Reservoir, Arab D Mbr Fm/ Arab D Anhydrite

Synonym:

Lithology and Thickness

In Arab A Reservoir Mbr: Various types of fine-grained limestone, and, calcarenite with minor anhydrite near the top. Anhydrite with subordinate dolomite.

In Arab B Anhydrite Mbr: Anhydrite and minor dolomite and limestone.

In Arab B Reservoir Mbr: Generally, strongly recrystallized calcarenite (probably oolite) and finely granular dolomite.

In Arab C Anhydrite Mbr: Anhydrite and minor dolomite and limestone.

In Arab C Reservoir Mbr: Various types of fine-grained limestone, and, calcarenite and minor dolomite.

In Arab D Mbr / Arab D Anhydrite Mbr: Fine-grained limestone, in part partially dolomitized, with interbedded calcarenite (mainly fine grained) generally with an original fine-grained matrix; subordinate dolomite.

Lithology Pattern:

Oolitic limestone

Relationships and Distribution

Lower contact

Regionally, the schematic strat column indicates the next older unit as Jubaila Fm. In Qatar and UAE, it is Diyab Fm

Upper contact

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

Regional extent

GeoJSON

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Fossils

Age

Kimmeridgian

Age Span:

Beginning stage:

Kimmeridgian

Fraction up in beginning stage:

0.3

Beginning date (Ma):

153.12

Ending stage:

Kimmeridgian

Fraction up in the ending stage:

1.0

Ending date (Ma):

149.24

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. Steineke et. al., 1958, Page 1307