Ubaid Fm
Period:
Jurassic
Age Interval:
Sinemurian – Pliensbachian, Iq3
Province:
Iraq
Type Locality and Naming
Column: Rutba Uplift (W Iraq)
Synonym:
Lithology and Thickness
Comprises pseudo-oolitic dolomitized limestone overlain by similar limestones with abundant chert nodules. 75m thick at type section.
Lithology Pattern:
Dolomite
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Zor Hauran Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Hussainiyat Fm
Regional extent
GeoJSON
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Fossils
Age
Sinemurian – Pliensbachian
Age Span:
Beginning stage:
Sinemurian
Fraction up in beginning stage:
0.15
Beginning date (Ma):
198.48
Ending stage:
Pliensbachian
Fraction up in the ending stage:
0.8
Ending date (Ma):
185.94
Depositional setting
Depositional pattern:
Additional Information
Compiler:
From S. Z. Jassim and J. C. Goff, Geology of Iraq, 2006. pg 105, Fig. 9-1: "Stratigraphic correlation of the Late Permian-Liassic Megasequence (AP6)."