Tanf Fm
Period:
Silurian, Ordovician
Age Interval:
Hirnantian – Ludfordian, Sr (1,2)
Province:
Syria
Type Locality and Naming
Column: Syria, Column: SE Syria
Synonym: Abba Fm
Lithology and Thickness
Abba Fm: greyish-black, thinly bedded micaceous shale with thin beds of fine-grade sandstone. Fossiliferous in basal beds. It is shown as Tanf or Abba Fms in the schematic strat column, hence added Tanf in the synonym.
Lithology Pattern:
Sandy claystone
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Afendi Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Markada Fm
Regional extent
GeoJSON
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Fossils
Age
Hirnantian – Ludfordian
Age Span:
Beginning stage:
Hirnantian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
445.21
Ending stage:
Ludfordian
Fraction up in the ending stage:
0.65
Ending date (Ma):
423.53
Depositional setting
Depositional pattern:
Additional Information
Compiler:
From Middle East Geological Timescale 2008 Al-Husseini, Journal of Middle East Petroleum Geosciences v 13, no. 4