Neogene

Paleogene

Cretaceous

Jurassic

Triassic

Permian

Carboniferous

Devonian

Silurian

Ordovician

Cambrian

Neoproterozoic

Mesoproterozoic

Paleoproterozoic

Main source = Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian) Translated to English by the GeoGPT group, Zhejiang Lab, Hangzhou, China--see About

Dasgiryak Formation

Dasgiryak Fm

Period:

Cretaceous

Age Interval:

Middle Turonian, B1a, B2

Province:
Bukhara-SW Gissar

Type Locality and Naming

Along the village of Dasgiryak, Tajikistan. M.R. Jalilov, 1968 (190, p.43). Stratotype on the southeast slope of the Jetymtau ridge, in the area of the village of Dasgiryak. Included in the Dasgiryak Horizon.

Synonym: Dasgiryak Suite, Дасгирякская св., Dasgirak Fm

Lithology and Thickness

Gray-green clays, siltstone (aleurolites) with interlayers of limestones and shell limestones. Thickness 25-100 m.

Lithology Pattern:

Shallow-marine marl

Relationships and Distribution

Lower contact

Conformably overlies the Talhab Fm or Shargun Fm

Upper contact

Conformably overlain by the Muzrabat Fm or Sangardak Fm.

Regional extent

Southeast, South, Southwest Gissar, Babatag ridge. Corresponds to the lower part of the Dehkanabad Fm (56; 189; 300, 452).

GeoJSON

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Fossils

Contains ammonites - Collignoniceras woolgari Mant., C, intermedium Haas., Proplacenticeras arkhangelsrii Iljin; marine bivalve mollusks - Inoceramus woodsi Böehm., Plicatula batnensis Coq., Liostrea jaxartensis Sim., L. ljangarensis Vinok., Costeina costei (Coq.); gastropods - Gyrodes garmakensis Dzhal.; foraminifera - Paragaudryina babaevi Suleim., Gavelinella moniliformis (Reuss), ostracods - Brachycythere dotata Mand., Cytherella elegans Andrv., C. bornemani Andrv.

Age

Belongs to the Middle Turonian; Along A., "Resolution...., 1977" (383) and in Strat. vol (446), - to the Upper Turonian.

Age Span:

Beginning stage:

Turonian

Fraction up in beginning stage:

0.4

Beginning date (Ma):

92.10

Ending stage:

Turonian

Fraction up in the ending stage:

0.55

Ending date (Ma):

91.42

Depositional setting

Depositional pattern:

Additional Information

Compiler:

I.M. Abdouazimova – In: GeoGPT translation of: “Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)”