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

Aktyuzh Formation

Aktyuzh Fm

Period:

Ordovician

Age Interval:

Floian, N8

Province:
Nuratau

Type Locality and Naming

Along the Aktoyak River, Mount S. Nuratau. Deposits established by Z.M. Abdouazimova and O.N. Khaletskaya in 1958 (5 , p.9). Named by Yu.V. Shumakov and L.I. Skakun in 1982 (1984). Stratotype Along the Aktoyak River in tectonic scales and blocks.

Synonym: Aktoyak Suite, Актюжская св.

Lithology and Thickness

Mica slates, siltstone (aleurolites), layers of clayey limestones. Thickness 70-100m.

Lithology Pattern:

Sandy claystone

Relationships and Distribution

Lower contact

Tectonic contacts.

Upper contact

Tectonic contacts.

Regional extent

South Nuratau, northern slope of Karakchatay, basins of the Aktoyak and Mulla-Malya rivers. Analog of the lower part of the Badamchaly Fm (165; 371). R.S. Khan et al. (1989), V.S. Korsakov et al. (1993), R.R. Usmanov et al. (1999) include the Aktyuzh Fm in the composition of the Badamchaly Fm.

GeoJSON

{"type":"Feature","geometry":{"type":"Polygon","coordinates":[[[65.651,40.579],[65.941,40.506],[66.125,40.407],[66.259,40.33],[66.646,40.226],[66.627,40.148],[66.301,40.227],[65.964,40.227],[65.638,40.26],[65.651,40.579]]]}}

Fossils

Contains Graptolites of the Arenig - Expansograptus abnormis (Hsü), E. cf. hirundo (Hsü), E. suecicus robustus (Monz.), Acrograptus aff. affinis (Nich.); chitinozoa - Desmochitina ornensis Paris., D. minor Eis.; conodonts - Oistodus (?) sp. ind.; radiolarians.

Age

Age Span:

Beginning stage:

Floian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

477.08

Ending stage:

Floian

Fraction up in the ending stage:

1.0

Ending date (Ma):

471.26

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)”