Bulyamush Fm
Period:
Proterozoic
Age Interval:
Vendian (?), Z5
Province:
Zarafshan-N.Gissar
Type Locality and Naming
Along the Bulyamush River. V.V. Mikhailov in 1998 (460, p.33). . Stratotype along the Bulyamush River. [Katarmai Mountains are in the northern part of the Ziaetdin Mountains.]
Synonym: Bulyamushskaya Suite, Булямушская св.
Lithology and Thickness
Mica-schists, siliceous slates, phyllites, metasandstones, meta-siltstones, quartzites, gravelites. Rocks are metamorphosed in the green schist facies, and primary sedimentary textures are clearly observed. Thickness: 950m.
Lithology Pattern:
Claystone
Relationships and Distribution
Lower contact
Lower contact is tectonic
Upper contact
Upper is overlain by Quaternary deposits
Regional extent
Northern part of the Katarmai and Chagataitau mountains.
GeoJSON
null
Fossils
Organic remains not found.
Age
Age is conditionally accepted as Vendian by comparison with the lower parts of the Khodzhaakhmet Fm (South Bukantau) and the Kurghantau Fm (South Tamdytau). Previously, V.S. Korsakov et al. (1984) included the deposits of the Bulyamush Fm in the composition of the Upper Katarmai sub-suite of the Lower Devonian; L.N. Belkova (101) - in the Auminzin Fm of the Riphean; Yu.A. Likhachev et al. (266) - to the Lower Paleozoic; on the State Geological Map-500 of Uzbekistan (460) - conditionally Vendian age.
Age Span:
Beginning stage:
Ediacaran
Fraction up in beginning stage:
0.5
Beginning date (Ma):
586.90
Ending stage:
Cambrian Stage 2
Fraction up in the ending stage:
1.0
Ending date (Ma):
521.00
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)”