Dunkeldyk Fm
Period:
Jurassic
Age Interval:
Middle Kimmeridgian (J3), M2
Province:
SE Tajik (SE Pamir)
Type Locality and Naming
Includes in SE Murghab district (Istyk type Dunkeldyk area)
Synonym: Dunkeldykskaya Suite, Дункельдыкская Свита
Reference section:
Lithology and Thickness
It is composed at the bottom (10-20 m) of coarse-bedded gray limestones, and at the top of massive white reef limestones. The total thickness of the Lower and Middle Kimmeridgian layers is 380 - 650 m.
Lithology Pattern:
Limestone
Relationships and Distribution
Lower contact
Schematic stratigraphic column indicates the lower contact as Zorkindik Fm
Upper contact
Absent.
Regional extent
It is widespread in the Southeast Pamir in the Istyk type Dunkeldyk area.
GeoJSON
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Fossils
Age
By their position in the section, both the Zorkindyk Fm and Dunkeldyk Fm (зоркиндыкская и дунке.пьдыкская свиты) are considered Middle Kimmeridgian. Higher layers of the Upper Jurassic section are absent here.
Age Span:
Beginning stage:
Kimmeridgian
Fraction up in beginning stage:
0.4
Beginning date (Ma):
152.56
Ending stage:
Kimmeridgian
Fraction up in the ending stage:
0.6
Ending date (Ma):
151.46
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Extracted from Baratov, R. B. (1976). Subdivisions of stratified and intrusive rocks of Tajikistan. Donish, Dushanbe, 276.