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

Zinzilban Beds Formation

Zinzilban Beds Fm

Period:

Devonian

Age Interval:

Lower Devonian, Z1

Province:
Zarafshan-N.Gissar

Type Locality and Naming

Along the Zinzilban Saya, Zarafshan Range. M.V. Erina, 1977 (470, p.15)

Synonym: Zinzilban Layers, Зинзильбанские сл., Zinsil’ban Beds; Zinzilban Beds; Zinzilban Layers.

Lithology and Thickness

Thin-bedded, fine- and medium-bedded, dark, detrital and clasto-detrital limestones, varying degrees of enrichment with clayey and silty (aleurolitic) material. Thickness 112m.

Lithology Pattern:

Clayey limestone

Relationships and Distribution

Lower contact

Conformably overlies the Kushnov Fm

Upper contact

Conformably overlain by the Kimov Beds Fm (and the Novbona Fm [but nothing in Lexicon with this spelling?]).

Regional extent

GeoJSON

null

Fossils

Characterized by stromatoporoids Simplexodictyon grandis Less.; tabulates - Favosites nitidus Chap., F. intricatus Barr., F. styriacus Pen., F. ex gr. gregalis Porf., Gephuropora sibirica Miron., Radiastraea zinzilbanica Erina; rugosans - Farabophyllum intermedium Lavrus., Gorgostrophia gorgo Havl., Asiatotoechia sinsilbanica Rzon. et Koss.; Tentaculites - Nowakia acuaria Richt., N. praecursor Bouč; graptolites - Monograptus craigensis Jaeger., M. aequabilis notoaequabilis Jaeger et Stein., M. thomasi Jaeger; conodonts - Polygnathus dehiscens P. et J. M.B. Erina". Strat. layers (443).

Age

Belong to the lower Emsian of the general scale.

Age Span:

Beginning stage:

Emsian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

410.51

Ending stage:

Emsian

Fraction up in the ending stage:

0.25

Ending date (Ma):

406.46

Depositional setting

Depositional pattern:

Additional Information

Compiler:

Z.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)”