Baysun-Neog Fm
Period:
Neogene
Age Interval:
Upper Miocene-Lower Pliocene, B2
Province:
Bukhara-SW Gissar
Type Locality and Naming
By Baysun village, Baysun depression. Yu.R. Smolnikov et al., 1971f. “-Neog” suffix added to distinguish from the Baysun-Jur of SW Gissar region.
Synonym: Baysunskaya Formation, Байсунская св., Baisun Fm
Lithology and Thickness
Gray, brownish-brown, orange sandstones, subordinate siltstone (aleurolites) and clays.
Lithology Pattern:
Sandstone
Relationships and Distribution
Lower contact
Overlies the Gadjak Fm with erosion
Upper contact
It is conformably overlain by the Kofrun-Neog Fm
Regional extent
Baysun and Surkhandarya depressions.
GeoJSON
null
Fossils
Contains ostracods - Cyprinotus ex gr. speciosus Mand., C. arasensis Bod., C. novellus Bod., C. aff. deruptus Schn., Linuocythere depressa Schn., L. aff. cinctura Mand., Eucypris glabra Bod., E. koktalensis Bod., Cypridopsis sp. C
Age
Yu.R. Smolnikov et al. (1971f), G.Yu. Alferov et al. (61) date the suite to the middle Miocene. B.I. Pinhasov refers it to the upper Miocene-lower Pliocene and considers it an age equivalent of the Aksu Fm of Ferghana.
Age Span:
Beginning stage:
Messinian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
7.25
Ending stage:
Messinian
Fraction up in the ending stage:
1.0
Ending date (Ma):
5.34
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)”