Aldyr Formation

Aldyr Fm

Period:

Neogene

Age Interval:

Lower Pliocene (?), F1

Province:
Fergana

Type Locality and Naming

Along the city of Aldyar, Fergana, Kyrgyzstan. A.S. Telenkov, 1964 (468, p.83). The stratigraphic name has limited application. B.I. Pinhasov

Synonym: Aldyar Suite, Алдырская св.

Lithology and Thickness

Brown-red siltstone (aleurolites) with layers of sandstones. Thickness 30-660m.

Lithology Pattern:

Siltstone

Relationships and Distribution

Lower contact

Lies unconformably on the Iskinaukat-Mioc Fm or Karasugat Fm

Upper contact

conformably overlies the Kaplankul Fm

Regional extent

South-Eastern Fergana. V.I. Popov et al. (166) correlate with the Yezgan Fm of Darvaza (Tajikistan) and the lower part of the gypsum-bearing suite A2 of the North-Western Fergana scheme of N.P. Vasilkovsky (126), These gypsum-bearing deposits Yu.R. Smolnikov et al. (1973f.) attributed to the Khamaltepin Fm. Along B.I. Pinhasov, correlates with the Obchak Fm.

GeoJSON

null

Fossils

Contains charophytes, freshwater gastropods, ostracods - Mediocypris and Cyprideis littoralis Br.

Age

Along A. age - conditionally Middle Miocene (166). Along B.I. Pinhasov, is conditionally Lower Pliocene. For schematic stratigraphic column representation, it is considered Zanclean.

Age Span:

Beginning stage:

Zanclean

Fraction up in beginning stage:

0.0

Beginning date (Ma):

5.34

Ending stage:

Zanclean

Fraction up in the ending stage:

0.5

Ending date (Ma):

4.47

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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