Ovkhanin Fm
Period:
Silurian
Age Interval:
Lower Wenlock, Z5
Province:
Zarafshan-N.Gissar
Type Locality and Naming
Along the Ovkhana River, Ziaetdin Mountains. V.S. Korsakov et al. in 1993 (460, p.87) from the composition of the Katadjarskaya suite. Stratotype in the Ovkhana River area. Previously (Korsakov et al., 1984) these deposits were attributed to the second type of section of the Katadzhar Fm.
Synonym: Ovkhaninskaya Formation, Овханинская св., Ovkhan Fm
Lithology and Thickness
Limestones, dolomitic limestones, clayey and sandy with chert nodules, in the top layers of argillites. Thickness 70-90m.
Lithology Pattern:
Limestone
Relationships and Distribution
Lower contact
Relationships with the underlying Yarmanchin Fm
Upper contact
Regional extent
Northern part of the Zirabulak Mountains; Ziaetdin Mountains (Beshtau Ridge, Ovkhana, Terikbaba rivers, etc.).
GeoJSON
null
Age
Early Wenlock age determined by tabulates Early Wenlock age determined by tabulates - Syringoporinus cf. alquabilis Lel. and others (Korsakov et al., 1984).
Age Span:
Beginning stage:
Sheinwoodian
Fraction up in beginning stage:
0.1
Beginning date (Ma):
432.70
Ending stage:
Sheinwoodian
Fraction up in the ending stage:
1.0
Ending date (Ma):
430.62
Depositional setting
Depositional pattern:
Additional Information
Compiler:
V.S. Korsakov, 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)”