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
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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)”