Alichur Complex Gr

Cenozoic

Cretaceous

Jurassic

Triassic

Permian

Carboniferous

Devonian

Silurian

Ordovician

Cambrian

Neoproterozoic

Main source = Baratov, R.B., et al. (1976). Subdivisions of stratified and intrusive rocks of Tajikistan. Publishing House "Donish", Dushanbe, 269 pp. plus tables. Provided by Dr. Jovid Aminov, Nazarbayev University, Astana, Kazakhstan Translated to English by the GeoGPT group, Zhejiang Lab, Hangzhou, China--see About

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Alichur Complex Gr

Period:

Quaternary

Age Interval:

Late Quaternary (Q_III), E-Psh1-3

Province:
East Tajik (East Pamir)

Type Locality and Naming

Includes in East Pshart, East Pshart (southern slope), East Pshart (Agadjan river basin)

Synonym: Alichur Complex, Аличурский комплекс

Reference section:

Lithology and Thickness

In the Eastern Pamir and on the Western Pamir, it is represented by alluvial, proluvial, and glacial deposits. Alluvial gravels form the second and third terraces in the valleys of modern rivers at heights of 8-15 and 18-30 m above the river bed, respectively, and in the upper parts of rivers, they cover the bottoms of modern valleys and adjoin the middle Quaternary deposits. Proluvial gravel and gravelly-pebble deposits form large cones of debris. Nose-shaped and dry deltas. Glacial deposits are stadial moraines of the last glaciation, transitioning into powerful fluvioglacial gravel cones; downstream, these in turn transition into alluvial gravels. Thickness ranges from 5 to 90 m.

The Alichur Complex Gr on the Eastern Pamir is represented by the same genetic types of deposits; however, here lacustrine deposits of proglacial lakes have gained widespread distribution. They are composed of gray-yellow clays with interlayers-stripes of sandy clays and lenses of sand and peat. The thickness of deposits is 8-15 m. In the lake basins (Sassykkul, Turumtaykul, Zorkul, etc.), they compose low terraces (8-16 and 25 m above the lake level), embedded in the upper, middle Quaternary terrace.

Lithology Pattern:

Glacial till

Relationships and Distribution

Lower contact

The schematic stratigraphic column indicates the lower contact as Dushanbe Gr

Upper contact

Regional extent

It is widespread in the Eastern and Western Pamir.

GeoJSON

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Fossils

In the peatlands, plant remains were discovered in 1962 by I.P. Yushin and I.V. Teploukhov: Potamogeton sp., Graminae gen., Cuperacea gen. sp.

Age

The degree of fossilization, according to V.S. Kornilova, indicates a late Quaternary age of the deposits. The Alichur complex Gr deposits are dated to the late Quaternary also on the basis of their transition into the upper Quaternary Dushanbe complex deposits (Vasilyev, 1966; Chediya, 1971).

Age Span:

Beginning stage:

Lt. Pleist.

Fraction up in beginning stage:

0.0

Beginning date (Ma):

0.13

Ending stage:

Lt. Pleist.

Fraction up in the ending stage:

1.0

Ending date (Ma):

0.01

Depositional setting

Proluvial, Deltaic, Glacial

Depositional pattern:

Additional Information

Compiler:

Extracted from Baratov, R. B. (1976). Subdivisions of stratified and intrusive rocks of Tajikistan. Donish, Dushanbe, 276.