Main Fm
Period:
Triassic
Age Interval:
Anisian, J1
Province:
Jordan
Lithology and Thickness
Carbonate.
Lithology Pattern:
Limestone
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Hudayb Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Hisban Fm
Regional extent
GeoJSON
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Fossils
Age
Coeval with the sandy Suwayma Fm; and both span the Early Triassic. For graphics purposes, these are shown schematically with a Suwayma Fm above the Main Fm.
Age Span:
Beginning stage:
Induan
Fraction up in beginning stage:
0.0
Beginning date (Ma):
251.90
Ending stage:
Olenekian
Fraction up in the ending stage:
0.2
Ending date (Ma):
249.24
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)."