Sarki Fm
Period:
Jurassic
Age Interval:
Hettangian – Toarcian, Iq4
Province:
Iraq
Type Locality and Naming
Column: N Iraq
Synonym:
Lithology and Thickness
Carbonate. Consists of a lower unit comprising of thin bedded, fine-grained, cherty and dolomitic limestone, alternating with cherty shale, occasional dark sugary dolomites, and bands of shell breccias, oolitic limestones, micro-conglomerates and recrystallization breccias. the upper unit consists almost entirely of dolomites. They are mostly soft and highly cavernous, alternating with soft, friable cherty dolomites and some shale and marls. 300m thick at type section.
Lithology Pattern:
Dolomite
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Baluti Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Sehkaniyan Fm
Regional extent
GeoJSON
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Fossils
Age
Hettangian – Toarcian
Age Span:
Beginning stage:
Hettangian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
201.36
Ending stage:
Toarcian
Fraction up in the ending stage:
0.5
Ending date (Ma):
179.45
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)."