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

Polychrome Formation

Polychrome Fm

Period:

Cretaceous

Age Interval:

Upper Cenomanian, S3, S5

Province:
North Tajik

Type Locality and Naming

Synonym: Polychrome suite, nестроцветная свита

Reference section:

Lithology and Thickness

Conglomerates and sandstones. It contains brightly colored clays with alternating layers of small medical conglomerates and sandstones with a total thickness of up to 25 m. The lower part of it, with a thickness of 5-10 m, is mute and is conditionally attributed to the upper part of the Cenomanian (Gazdagansky horizon). The middle part, with a thickness of 5-10 m, containing shell layers with Rhynchostreon chaperi (Bayle), Exogyra olisiponensis Sharpe, etc. (Likan), is Lower Turonian (Talhabsky horizon). The upper part of the colorful suite is represented by greenish-gray and red clays, conglomerates, sandstones, and shell layers with a total thickness of 5-15 m. Above, Coniacian stage sediments are conformably deposited. The total thickness of the Cenomanian and Turonian in the northeastern part of the Turkestan region is 35-87m.

Lithology Pattern:

Aus Conglomerate

Relationships and Distribution

Lower contact

Upper contact

Above, Coniacian stage sediments are conformably deposited.

Regional extent

GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[69.06,39.24],[69.08,39.38],[69.16,39.48],[69.7,39.57],[69.92,39.53],[70.09,39.56],[70.24,39.51],[70.46,39.58],[70.52,40.05],[70.56,40.08],[70.78,40.13],[70.76,40.11],[70.66,40.09],[70.65,40.08],[70.65,40.01],[70.64,39.57],[70.54,39.46],[69.87,39.3],[69.46,39.25],[69.2,39.26],[69.06,39.24]]]]}}

Fossils

In it, remains of bivalves and gastropods Liostrea delettrei (Coq.), Tylostoma ferganense Pcel., etc., have been found. It is attributed to the Upper Turonian (Dasgiryaqsky and Muzrabsky horizons). The middle part, with a thickness of 5-10 m, containing shell layers with Rhynchostreon chaperi (Bayle), Exogyra olisiponensis Sharpe, etc. (Likan), is Lower Turonian (Talhabsky horizon).

Age

Upper Cenomanian

Age Span:

Beginning stage:

Cenomanian

Fraction up in beginning stage:

0.9

Beginning date (Ma):

94.56

Ending stage:

Turonian

Fraction up in the ending stage:

0.5

Ending date (Ma):

91.65

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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