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

Tutbulak Formation

Tutbulak Fm

Period:

Carboniferous

Age Interval:

Upper Tournaisian, CK9

Province:
Chatkal-Kuramin Region

Type Locality and Naming

In the city of Tutbulak, on the left bank of the Saubulak River in its lower course, on the northern slope of the Kuramin Range. I.M. Nigmadjanov et al., 1992. Stratotype in the area of the summit of Mount Tutbulak.

Synonym: Tutbulakskaya Suite, Тутбулакская св.

Lithology and Thickness

Gray to black, medium- to thick-bedded, organogenic-detrital, detrital-crinoidal, brachiopod-detrital limestones. In the lower and middle parts, siliceous inclusions of grayish-brown and black color in the form of nodules, lenses, and layers, the quantity of which in some places reaches 40% of the volume of the rock. Thickness 140-200m.

Lithology Pattern:

Limestone

Relationships and Distribution

Lower contact

Lies with angular and stratigraphic unconformity on the Kulbatin Fm

Upper contact

It is conformably overlain by the Saukbulak Fm

Regional extent

Northern slope of the Kuramin Range, between the Kyzata and Urgaz rivers.

GeoJSON

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Fossils

In the upper parts - accumulations (banks) of numerous paleochoristites. Contains brachiopods - Palaeochoristites desinuatus (Lis.), P. čatkalicus (Dik.), Camarotoechia cf. rowleyi Well.; foraminifers - Parathurammina cushmani Sul., Eotuberitina maljavkini (Reitl.), Endothyra latispiralis Lip., conodonts - Siphonodella duplicata (B. et M.), S. isosticha (Coop.), Neopolygnathus communis (B. et M.).

Age

Lower Carboniferous (Upper Tournaisian)

Age Span:

Beginning stage:

Tournaisian

Fraction up in beginning stage:

0.6

Beginning date (Ma):

351.76

Ending stage:

Tournaisian

Fraction up in the ending stage:

0.8

Ending date (Ma):

349.24

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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