Unayzah Fm
Period:
Permian
Age Interval:
Artinskian – Roadian, Kw1, Bn1
Province:
Kuwait, Bahrain
Type Locality and Naming
Column: Kuwait, Column: Bahrain
Synonym:
Lithology and Thickness
Coarse-grained sandstone. Fine to coarse-grained quartz sandstone, siltstone, claystone that contains stringers of carbonate in the upper part. Grades upward from fan conglomerate at the base into numerous braided channel fills, capped by distal fan and playa facies. Eolian sandstone beds are also present. Reservoir facies are predominantly sandstone beds that are fine to coarse grained and poorly cemented to friable. Presence of authigenic clay minerals.
Lithology Pattern:
Coarse-grained sandstone
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates this is the oldest unit
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Khuff Fm
Regional extent
GeoJSON
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Fossils
Age
Artinskian – Roadian
Age Span:
Beginning stage:
Artinskian
Fraction up in beginning stage:
0.15
Beginning date (Ma):
289.43
Ending stage:
Roadian
Fraction up in the ending stage:
0.8
Ending date (Ma):
270.24
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.