Tautash Fm
Period:
Silurian
Age Interval:
Upper Wenlock (S1), C1
Province:
Central W Tajik
Type Locality and Naming
It is represented in Dukdon type section. (V. Lavrusevya and others. 1973b)
Synonym: Toutashtash thickness, Tautash layer
Reference section:
Lithology and Thickness
It is composed of white oolitic limestones and claystones.
Lithology Pattern:
Oolitic limestone
Relationships and Distribution
Lower contact
Upper contact
Overlying deposits are absent.
Regional extent
It is widespread in the Zarafshan-Gissar region, and it is represented in Dukdon type section, developed in the southern part of the Obihundy ridge.
GeoJSON
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Fossils
with Upper Wenlock rugose Tryplasma schikorchonense Lavrus and graptolites Monograptus ex gr. flemingi (Salter), Pristiograptus sp., Monoclimacis cf. vomerina Nich.
Age
Upper Wenlock based on the fossil data
Age Span:
Beginning stage:
Homerian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
430.62
Ending stage:
Homerian
Fraction up in the ending stage:
1.0
Ending date (Ma):
426.74
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Extracted from Baratov, R. B. (1976). Subdivisions of stratified and intrusive rocks of Tajikistan. Donish, Dushanbe, 276.