Qasim Fm
Period:
Ordovician
Age Interval:
Darriwilian – Sandbian, Sa (1,2,4), Iq3
Province:
Saudi Arabia
Type Locality and Naming
Column: Saudi Arabia Outcrop, Saudi Arabia Subsurface, NW Saudi Arabia, Rutba Uplift (W Iraq)
Synonym:
Lithology and Thickness
Sandstone and Claystone. It is further divided into Quwarah Member, Ra'an Member, Kahfah Member, Hanadir Member
Lithology Pattern:
Sandstone
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Saq Sandstone Fm. In Rutba Uplift (W Iraq), it is Amud Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Sarah Fm. In Rutba Uplift (W Iraq), it is Khabour Fm
Regional extent
GeoJSON
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Fossils
Age
Darriwilian - Sandbian
Age Span:
Beginning stage:
Darriwilian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
469.42
Ending stage:
Sandbian
Fraction up in the ending stage:
0.7
Ending date (Ma):
454.38
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