Karachim Fm
Period:
Permian
Age Interval:
Ka1
Province:
NE corner Tajik
Type Locality and Naming
It was distinguished by E. F. Roman'ko in 1960.
Synonym:
Reference section:
Lithology and Thickness
It consists of metamorphosed argillaceous slates and sandstones, containing large bodies of massive light reef limestones, as well as interlayers and lenses of conglomerates, greenstone-altered diabases and porphyrites. The quantitative ratios between these rocks are variable. The incomplete thickness of the suite is 1500 m.
Lithology Pattern:
Clayey sandstone
Relationships and Distribution
Lower contact
The contacts of the suite are tectonic.
Upper contact
The contacts of the suite are tectonic.
Regional extent
It is widespread in the eastern part of the Karakul district.
GeoJSON
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Fossils
No organic remains have been found in it.
Age
Middle Permian. It is mentioned that it is attributed to the Permian system. Therefore, it is represented in Middle Permian for schematic stratigraphic column purpose. The Karachim Fm (карачимская свита) is conditionally referred to the Permian system, only based on some similarity of the rocks with the formations of the Jingadzhir Fm (джингаджирской Свиты) of the Karachatyrsko-Murgab horizons, which is emphasized by the presence in both suites of large bodies of light limestones. E. Ya. Leven and A. Kh. Kafarskii (1965) conditionally refer the Karachim Fm to the Lower Carboniferous based on the comparison of it with the greenstone formations of the Fortambek Fm and Devlokhan Fm (фортамбекской и девлоханской свит) of Tournaisian and Visean ages.
Age Span:
Beginning stage:
Roadian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
274.37
Ending stage:
Roadian
Fraction up in the ending stage:
1.0
Ending date (Ma):
269.21
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Extracted from Baratov, R. B. (1976). Subdivisions of stratified and intrusive rocks of Tajikistan. Donish, Lakhsh district, 276.