Daraitut Fm
Period:
Silurian
Age Interval:
Llandovery, Z5
Province:
Zarafshan-N.Gissar
Type Locality and Naming
Along the Daraitut stream, Zirabulak Mountains. V.S. Korsakov, E.I. Barkovskaya in 1961 (1962); (443, p. 114). Stratotype along the Daraitut stream.
Synonym: Daraitut Suite,
Lithology and Thickness
Lithology Pattern:
Siltstone
Relationships and Distribution
Lower contact
The lower boundary is unknown
Upper contact
The upper - normal stratigraphic with a gradual transition to the carbonate rocks of the Katadzhar Fm.
Regional extent
Northern part of the Zirabulak Mountains and central part of the Ziaetdin Mountains.
GeoJSON
null
Fossils
Crinoids - Megalocrinus brevis Schew., Pentagonopentopentalis cf. bylfiiracus Schew.; tabulates - Catenipora cf. gotlandica Yabe., Favosites sp.
Age
Llandovery age is established by crinoids. In the Strat. Sl. (443) it was attributed to the Middle Ordovician-Lower Silurian; in (166) - conditionally to the Llandovery.
Age Span:
Beginning stage:
Rhuddanian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
443.07
Ending stage:
Telychian
Fraction up in the ending stage:
1.0
Ending date (Ma):
432.93
Depositional setting
Depositional pattern:
Additional Information
Compiler:
V.S. Korsakov – In: GeoGPT translation of: “Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)”