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

Shing Formation

Shing Fm

Period:

Silurian

Age Interval:

Llandovery-Wenlock, Z1

Province:
Zarafshan-N.Gissar

Type Locality and Naming

Along the Shing River, Zarafshan-Gissar mountain region, Central Tajikistan. V.R. Martyshev, 1956 (290, pp.51-57; 264, pp.3-37). Stratotype in the area of the Daurch River, Tajikistan.

Synonym: Shing Suite, Шингская св.

Lithology and Thickness

In the Lower part - clayey dolomitized limestones

Higher up - limestones, dolomites with rare layers of quartz sandstones, gravels, argillites, and cherts.

Lithology Pattern:

Clayey limestone

Relationships and Distribution

Lower contact

It conformably overlies the Shakhriomon Gr limestone

Upper contact

It is conformably overlain by the Arg Gr dolomite series (460).

Regional extent

Zeravshan and Gissar ridges.

GeoJSON

null

Fossils

In the Lower part - contains a large number of stromatoporoids - Ecelimadictyon microvesiculosum Riab., E. fastigiatum Nich., Clathradictyon bareale Riab., C. regulare (Rousen.), C. vesiculosum Nich. et Murib., C. microstriatellum Riab., etc.; tabulates - Palaeofavosites schmidti Sok., P. alveolaris (Goldf.), P. hirtus Sok., P. oelaensis Klaam., P. paulus Sok., Syringopora scabre Sok., etc.; rugose - Cystipaliphyllum kimi Lavr., Pseudophaulactis lycophylloides Zapr. et Ivnsk., etc.; brachiopods - Resserella neograssa (Nikif.), Pentamerus magianicus Men., characteristic of the Llandovery stage of the early Silurian.

In the Upper part - They contain stromatoporoids Ecclimadictyon schachriomanum Less., Plectostroma sumsarense Less.; tabulates Thecia ramanovski Lel., Halysites sp. (cf. batus Tchern.) etc.; brachiopods Pentamerus ex gr. oblongus Saw., Virgiana ex gr. barrandei Bill., Acanthispirifer cf. edelsehteini Men. of Llandovery-Wenlock age (264).

Age

It belongs to the Llandovery-Wenlock stage of the Lower Silurian.

Age Span:

Beginning stage:

Rhuddanian

Fraction up in beginning stage:

0.2

Beginning date (Ma):

442.56

Ending stage:

Homerian

Fraction up in the ending stage:

0.75

Ending date (Ma):

427.71

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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