Sahmah Fm
Period:
Ordovician, Silurian
Age Interval:
Hirnantian – Aeronian, On1
Province:
Oman
Lithology and Thickness
An upper Sandy Mbr, and lower Shaley Mbr.
Lithology Pattern:
Clayey sandstone
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Hasirah Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as the Misfar Fm in the Misfar Gr
Regional extent
GeoJSON
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Fossils
Age
Hirnantian - Aeronian
Age Span:
Beginning stage:
Hirnantian
Fraction up in beginning stage:
0.3
Beginning date (Ma):
444.57
Ending stage:
Aeronian
Fraction up in the ending stage:
0.3
Ending date (Ma):
439.92
Depositional setting
Depositional pattern:
Additional Information
Compiler:
From Forbes, G.A., Hansen, H.S.M., and Shreurs, J., 2010. Lexicon of Oman: Subsurface Stratigraphy. Gulf Petrolink, 371 pp. (plus enclosures and CD); and Middle East Geological Timescale 2008 Al-Husseini, Journal of Middle East Petroleum Geosciences v 13. no. 4