Shirkent Fm
Period:
Cretaceous
Age Interval:
Berriasian - Hauterivian (?), B2
Province:
Bukhara-SW Gissar
Type Locality and Naming
Along the Shirkent River, tributary of the Surkhandarya River. V.N. Shvanov, 1961 (504, p.76). Stratotype on the Karatag River, tributary of the Surkhandarya.
Synonym: Shirkent Suite, Ширкентская св.
Lithology and Thickness
Conglomerates, gravelites, brownish-red, lilac sandstones with layers of siltstone (aleurolites). Thickness 30-160m.
Lithology Pattern:
Aus Conglomerate
Relationships and Distribution
Lower contact
Transgressively overlies the Paleozoic and with erosion on the Karabil Fm
Upper contact
Overlain with erosion by the Kyzyltash Fm
Regional extent
South, Central Gissar. Correlated with the upper parts of the Karabil, Almurad, and lower parts of the Kyzyltash suites (taken together).
GeoJSON
null
Fossils
Age
Conditionally belongs to the Berriasian - Givetian; Along the Decision ..., 1977 (383), - to the Berriasian - lower Hauterivian; in the Strat. vol. (446) - to the Tithonian - Hauterivian.
Age Span:
Beginning stage:
Valanginian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
137.70
Ending stage:
Hauterivian
Fraction up in the ending stage:
0.5
Ending date (Ma):
129.55
Depositional setting
Depositional pattern:
Additional Information
Compiler:
I.M. Abdugazimova – In: GeoGPT translation of: “Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)”