Lyupek Formation

Lyupek Fm

Period:

Ordovician

Age Interval:

Caradocian-Ashgillian, K2

Province:
Kyzylkum Region

Type Locality and Naming

Along the village of Lyupex, South Bukantau. Ya.B. Aysanov et al., 1984.

Synonym: Lyupex Suite, Люпская св.

Lithology and Thickness

Quartz-siliceous-feldspar sandstones, siliceous-quartz sandstones, siltstone (aleurolites), and argillites, rarely layers of gravelites. The rocks have a greenish-gray, dark green, bluish-light-green color. Thickness 200-1000(?)m.

Lithology Pattern:

Sandstone

Relationships and Distribution

Lower contact

Accordng to A.A. (to the south of the village of Telibay and north of the Kosh-Koksay), the suite lies conformably on the Telibay Fm and unconformably (northwest and northeast of the villages of Erembetza and Telibay)

Upper contact

It is overlain by the carbonate deposits of the Irlik Fm; in other places, the contacts are tectonic (165; 460).

Regional extent

South Bukantau, south of the Irlyr carbonate ridge, in the form of narrow strips of latitudinal and sublatitudinal extension; Jetymtau II. It is correlated with the middle and upper parts of the Ilonchisay suite of the S. Nuratau ridge.

GeoJSON

null

Fossils

Graptolites - Rectograptus ex gr. truncatus (Lapw.), Diplograptus aff. anderkensis Keller., Amplexograptus sp. and others; conodonts - Falodus prodentatus (Grav. et El.), Belodina cf. compressa Br. et Mehl. and others.

Age

Age Span:

Beginning stage:

Darriwilian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

469.42

Ending stage:

Katian

Fraction up in the ending stage:

1.0

Ending date (Ma):

445.21

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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