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

Sappen Formation

Sappen Fm

Period:

Devonian

Age Interval:

Lower-Middle Devonian, Z5a

Province:
Zarafshan-N.Gissar

Type Locality and Naming

Along the Sappen well, Ziaetdin Mountains. I.A. Pyanova et al., 1986 (371, p. 61). Stratotype in the Sappen well region. The stratigraphic name is not recommended for use.

Synonym: Sappen Suite, Сапенская св.

Lithology and Thickness

Alternating sericite-clayey, siliceous shales, sandstones, siltstone (aleurolites), limestones, dolomites with rare layers and lenses of conglomerates and gravelites. Up to 650-700m.

In the Ziaetdin Mountains, according to V.V. Mikhailov (1988; 460), the Sappen Fm does not have independent significance, as it includes metamorphic slates of the Katarmay Fm (?Proterozoic), limestones and dolomites of the lower-middle Devonian, and sandstones and slates of the Altyaul Fm (middle Ordovician).

Lithology Pattern:

Sandy_claystone

Relationships and Distribution

Lower contact

Lower and upper boundaries are tectonic (371).

Upper contact

Lower and upper boundaries are tectonic (371).

Regional extent

Southern slope of the Karatau Mountains, scattered small outcrops of the southern foothills - Vaukh region, south of the Chettyk intrusion, Kairagach well region.

GeoJSON

null

Fossils

Contains crinoids - Cupressocrinites gracilis Goldf., C. abbreviatus Goldf., Pentagonocyclicus acanthaceus Schew., Tetrago notetragonalis aff. annexus Schew., T. minor Schew.

Age

Lower-Middle Devonian

Age Span:

Beginning stage:

Lochkovian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

419.00

Ending stage:

Lochkovian

Fraction up in the ending stage:

1.0

Ending date (Ma):

412.40

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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