Lyakan Fm
Period:
Cretaceous
Age Interval:
Middle-Late Albian (K12), S3, S5
Province:
North Tajik
Type Locality and Naming
Synonym: Lyakanskaya suite
Reference section:
Lithology and Thickness
It is characterized by cryptocrystalline limestones and red-brown clays. The thickness is from 15 to 70 m.
Lithology Pattern:
Clayey limestone
Relationships and Distribution
Lower contact
Upper contact
Regional extent
It is distributed in the northeastern part of the Turkestan region, in the basin of the Isfara river.
GeoJSON
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Fossils
Age
The age range of the Muyan and Lyakan Fms are not accurately established. One can only state the following. The characteristic Lyakan limestones and variegated clays of the Kyzylpilyal Fm strikingly resemble analogous facies in the Zarafshan-Gissaro region - in the Ravat Fm and Fandaryin Fm of the Ravat graben and the Kanchoch locality, where their age is no older than the Middle-Late Albian. For schematic stratigraphic representation, it is adjusted in Late Albian.
Age Span:
Beginning stage:
Albian
Fraction up in beginning stage:
0.8
Beginning date (Ma):
103.04
Ending stage:
Albian
Fraction up in the ending stage:
1.0
Ending date (Ma):
100.50
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Extracted from Baratov, R. B. (1976). Subdivisions of stratified and intrusive rocks of Tajikistan. Donish, Dushanbe, 276.