Amudarya 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

Select Region(s) to search
Hold Ctrl (Windows/Linux) or Command (Mac) to select multiple

Amudarya Gr

Period:

Quaternary

Age Interval:

Holocene (Qiv), K1, S5

Province:
SW Tajik, North Tajik

Type Locality and Naming

Includes in Khation Region, Sughd Region

Synonym: Amudarya complex, Амударьинский комплекс

Lithology and Thickness

In South-Western Tajikistan, it unites alluvial and proluvial deposits, having the same composition, structure and geomorphological position as the Syrdarya complex. Its thickness is 3-10 m. In the regions of Central Tajikistan, in the P. I. Peak range, the Zaalaiksky range, and on the Pamir, the above-described types of deposits are joined by glacial formations - moraines of the current glaciation and fluvioglacial gravels and sands emanating from them. In lake basins, the Amudarya complex corresponds to gravels., sands and clays that make up the beach. The thickness of the Amudarya complex in Central Tajikistan is 4-12, on the Pamir-2-20 m.

Lithology Pattern:

Aus Conglomerate

Relationships and Distribution

Lower contact

Locally unconformably overlies the Kulyab Gr (Pliocene) or the Tavildara Fm of upper Miocene

Upper contact

Modern surface

Regional extent

The term is applied generally; hence widespread in Central, South-Western and South-Eastern Tajikistan.

GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[70.65,39.57],[70.65,39.56],[70.77,39.18],[70.09,38.09],[70.15,37.64],[70.1,37.38],[69.24,36.5],[68.47,36.26],[67.66,36.14],[66.74,36.17],[66.5,37.13],[67.08,38.16],[67.61,38.73],[67.95,38.7],[68.74,38.75],[70.01,38.98],[70.68,39.21],[70.54,39.46],[69.88,39.3],[69.44,39.25],[69.22,39.25],[69.06,39.22],[69.08,39.37],[69.18,39.49],[69.71,39.57],[69.92,39.53],[70.08,39.55],[70.26,39.51],[70.48,39.58],[70.65,39.57]]]]}}

Fossils

Age

In the deposits of the Amudarya complex in many places (Eastern Pamir, Southwestern Tajikistan), Holocene archaeological sites have been found (Ranov, Sidorov, 1960; Ranov, 1961), with radiological ages of 10,000 years in the Markansu valley. The underlying Kulyab Gr says it is overlain by Middle Pleistocene; but base of Late Pleistocene used here.

Age Span:

Beginning stage:

Lt. Pleist.

Fraction up in beginning stage:

0.0

Beginning date (Ma):

0.13

Ending stage:

Holocene

Fraction up in the ending stage:

1.0

Ending date (Ma):

0.00

Depositional setting

Depositional pattern:

Alluvial and proluvial deposits

Additional Information

Compiler:

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