Mashrap Fm
Period:
Devonian
Age Interval:
Middle Devonian, CK9c
Province:
Chatkal-Kuramin Region
Type Locality and Naming
Along Mashrapsay, Kuramin Range. B.N. Nasledov, I.V. Belov in 1942 (457, p. 87, 90).
Synonym: Mashrapsay Suite, Машрапская св.
Lithology and Thickness
Conglomerates, gravellites, sandstones, siltstone (aleurolites). Thickness 30-850m. M.A. Akhmedjanov, N.I. Ishnazarov (210) note the lateral facies instability of the suite and the appearance of volcanomictic sandstones in its composition
Lithology Pattern:
Aus Conglomerate
Relationships and Distribution
Lower contact
It unconformably overlies terrigenous deposits of the Paleozoic (165; 441)
Upper contact
It is overlain by the Mogotau Fm (the nature of the contact is unclear).
Regional extent
Kuramin Range, Mogoltay and Bariktyntay mountains.
GeoJSON
null
Fossils
The suite is not faunally characterized
Age
Its age is interpreted differently by various researchers. Some refer it to the Eifelian (457); others (78,460) - to the early Givetian based on the fact that it is overlain by the Mogoltay suite of the Givetian, some (166) assign it to the early-middle Devonian undivided; or (441) - to the Eifelian or early Givetian.
Age Span:
Beginning stage:
Eifelian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
394.30
Ending stage:
Eifelian
Fraction up in the ending stage:
1.0
Ending date (Ma):
385.30
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Z.M. Abdouazimova – In: GeoGPT translation of: “Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)”