Seyahou Fm
Period:
Ordovician
Age Interval:
Darriwilian – Hirnantian, Ir1
Province:
Iran
Type Locality and Naming
Column: Zagros belt (general)
Synonym:
Lithology and Thickness
Sandstone.
Lithology Pattern:
Sandstone
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Zard Kuh Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Sarchahan Fm
Regional extent
GeoJSON
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Fossils
Age
Darriwilian – Hirnantian
Age Span:
Beginning stage:
Darriwilian
Fraction up in beginning stage:
0.95
Beginning date (Ma):
458.74
Ending stage:
Hirnantian
Fraction up in the ending stage:
1.0
Ending date (Ma):
443.07
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Middle East Geological Timescale 2008 Al-Husseini, Journal of Middle East Petroleum Geosciences v 13, no. 4