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

Kaligrek Formation

Kaligrek Fm

Period:

Cretaceous

Age Interval:

lower-Middle Aptian, B1

Province:
Bukhara-SW Gissar

Type Locality and Naming

Along the distorted name of the Kamprak Gorge, Southwest Gissar. N.P. Kheraskov, 1934 (487, p.21). Stratotype on the western slope of the Kamprak Gorge, at the southern end of the Kelif-Shirabad ridge. Lowermost formation in Kamprek Gr. It is part of the Kaligrek Horizon (55; 115; 133; 167; 274; 361; 362; 415; 452).

Synonym: Kaligrekskaya Suite, Калгирская св.

Lithology and Thickness

Gray clays, siltstone (aleurolites), sandstones with layers of limestones and red-colored sandstones. Thickness 40-95m.

Lithology Pattern:

Sandy_claystone

Relationships and Distribution

Lower contact

Lies with erosion on the Okuzbulak Fm (Oquzbulak Fm) (Okuzbulak Gr)

Upper contact

It is overlain with erosion by the Kulkamysh Fm.

Regional extent

Southwest Gissar, Bukhara-Karshinsky region. Corresponds to the Aksu Fm (Aksuy Fm) and Gelandaryin Fm.

GeoJSON

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Fossils

Contains ammonites - Parahoplites melchioris Anth.; marine bivalve mollusks - Rhynchostreon latissimum (Lam.), Linotrigonia rectaespinosa Sav, Pholadomya cornueliana Orb.; gastropods - Paraglauconia dimorpha Dzhal., Haustator vibraensis Orb.; brachiopods - Cyclothyris depressa Sow:; sea urchins - Epiaster luppovi Lob, ostracods - Protocythere derooi Oertli., Antepaijenborchella turkmenica Andrv., Oncocytheridea prosocialis Mand., Cypridea gissarensis Andrv.

Age

Belongs to the middle Aptian (P. melchioris zone); some researchers refer the Kaligrek Fm to the lower-middle Aptian (54; 201).

Age Span:

Beginning stage:

Aptian

Fraction up in beginning stage:

0.35

Beginning date (Ma):

118.53

Ending stage:

Aptian

Fraction up in the ending stage:

0.5

Ending date (Ma):

117.30

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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