Derenjal Fm
Period:
Cambrian
Age Interval:
Guzhangian - Cambrian Stage 10, Ir2
Province:
Iran
Lithology and Thickness
Thickness of 832m. Thin-bedded, flaggy limestone. Black on fresh fractures, but weathers to a yellowish-tan. Intercalations of shale and marl, and lenticular layers of sparry and sand. Some beds are crowded with trilobite fragments.
Lithology Pattern:
Limestone
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Kalshaneh Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Shirgesht Fm
Regional extent
GeoJSON
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Fossils
Age
Guzhangian - Cambrian Stage 10
Age Span:
Beginning stage:
Guzhangian
Fraction up in beginning stage:
0.5
Beginning date (Ma):
498.75
Ending stage:
Cambrian Stage 10
Fraction up in the ending stage:
0.9
Ending date (Ma):
487.27
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Middle East Geological Timescale 2008 Al-Husseini, Journal of Middle East Petroleum Geosciences v 13, no. 4