Suzak Formation

Suzak Fm

Period:

Paleogene

Age Interval:

lower Eocene (Ypresian), F2

Province:
Fergana

Type Locality and Naming

Along the village of Suzak, Fergana Depression. O.S. Vyalov, 1935 (155, p.280). Stratotype in the area of the city of Isfara, Fergana Depression.

Synonym: Suzakskaya Svita, Suzak Mountain, Сузакская св.

Lithology and Thickness

Green, greenish-gray, lilac, silty (aleurolitic) clays with interlayers of low-power sandstones, siltstone (aleurolites), phosphorite nodules, and siliceous streaks. Thickness up to 65m. In the W. Fergana, the Suzak Fm includes red, brownish-brown clays with interlayers of white gypsum.

Lithology Pattern:

Sandy claystone

Relationships and Distribution

Lower contact

Conformably overlies the Bukhara Fm and Suluktin Fm

Upper contact

Conformably overlain by the Alay Fm

Regional extent

Fergana Depression. Correlated with the middle part of the Givar Fm of the Southwest Gissar (Abdusamatov, 1991), upper part of the Kainarbulak Fm of the Prishashkent region, Nurin Fm or lower part of the Sugralin Fm of the Kyzylkum.

GeoJSON

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Fossils

Contains oysters - Ostrea hemiglobosa Rom., complex of spores and pollen - Anacolosidites trimigonsis Zakl., Pentapollenites ferganica Tcher., Trudopollis orbinatus Zakl., Triatrio-pollenites manifestus R. Pot.

Age

Belongs to the lower Eocene (Ypresian stage). [The underlying Suluktin Fm extends into Ypresian; therefore base put arbitrarily at mid-Ypresian.]

Age Span:

Beginning stage:

Ypresian

Fraction up in beginning stage:

0.5

Beginning date (Ma):

52.04

Ending stage:

Ypresian

Fraction up in the ending stage:

1.0

Ending date (Ma):

48.07

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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