Mila Gr
Period:
Cambrian, Ordovician
Age Interval:
Cambrian Stage 4 – Darriwilian, Ir2
Province:
Iran
Type Locality and Naming
It is divided into the upward succession of the Kalshaneh Fm, Derenjal Fm, Shirgesht Fm
Column: Central Iran
Synonym:
Lithology and Thickness
Kalshaneh Fm (coarse sandstone), Derenjal Fm (limestone), Shirgesht Fm (dolomitic limestone to shale)
Lithology Pattern:
Sandy limestone
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Lalun Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Niur Fm (Gushkamar Gr)
Regional extent
GeoJSON
null
Fossils
Age
Cambrian Stage 4 – Darriwilian
Age Span:
Beginning stage:
Cambrian Stage 4
Fraction up in beginning stage:
0.95
Beginning date (Ma):
509.28
Ending stage:
Darriwilian
Fraction up in the ending stage:
0.95
Ending date (Ma):
458.74
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Middle East Geological Timescale 2008 Al-Husseini, Journal of Middle East Petroleum Geosciences v 13, no. 4