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

Daurich Member Formation

Daurich Member Fm

Period:

Silurian

Age Interval:

middle Llandovery, Z1

Province:
Zarafshan-N.Gissar

Type Locality and Naming

Along the Daurichi Mountain, C. Tajikistan. A.I. Lavrushevich, G.N. Menakova, 1966 (368, p.20). Stratotype in the section of the Daurichi Mountain.

Synonym: Daurichi Layers, Дауричские сл., Daurich Beds; Darurich Layers.

Lithology and Thickness

Foliated clayey dolomitized limestones. Thickness 25-40m.

Lithology Pattern:

Clayey limestone

Relationships and Distribution

Lower contact

Underlain by Bilfurak Beds Fm

Upper contact

Overlain by Mukhak Beds Fm

Regional extent

Zeravshan-Gissar mountain region.

GeoJSON

null

Fossils

Stromatoporoids encountered - Clathrodyctyon microstriatellum Riab., C. zviklovzgense Riab.; tabulates Palaeofavosites sp., Favosites sp., Subalveolites linatus Gelesh., Catenipora taimyrica Tchern.; rugosans - Protopilophyllum carinatum Lavr., Calostylis denticulata Kjerulf, Cystiphyllum densum Hill.; brachiopods - Virgiana barrandei Bill., Spirigerina ? dauritschensis Menak., Atrypina? frequens Menak

Age

Belong to the middle Llandovery. Initially (265) described as "F layers". A.I. Lavrushevich". Strat. sl. (441).

Age Span:

Beginning stage:

Aeronian

Fraction up in beginning stage:

0.5

Beginning date (Ma):

439.54

Ending stage:

Aeronian

Fraction up in the ending stage:

1.0

Ending date (Ma):

438.59

Depositional setting

Depositional pattern:

Additional Information

Compiler:

Z.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)”