Khatchin Fm
Type Locality and Naming
Along the village of Hatchi, South Nuratau Range. Y.I. Loskin et al. in 1965 in the volume of middle Llandovery (1965). Later, A.A. based on graptolite finds, assigned it to the upper part of the lower to middle Llandovery (271, pp.41-42). The term is no longer in use.
Synonym: Khatchinskaya Suite, Хатчинская св.
Lithology and Thickness
Lower part of the section - clay-slate, interbedded with quartz siltstone (aleurolites) and sandstones containing graptolites of the upper lower-middle Llandovery.
Upper part - terrigenous flysch, represented by rhythmically alternating sandstones, siltstone (aleurolites), clayey, sometimes phyllitic slates.
Thickness 300-400 m.
Relationships and Distribution
Lower contact
Stratigraphic contacts not established.
Upper contact
Stratigraphic contacts not established.
Regional extent
South Nuratau range, southern slope and watershed part of Karakchatay. In the modern understanding, the lower part of Khatchin Fm belongs to the Nakrut Fm, the upper part is an age and lithological analogue of the Nauchat Fm (Korsakov et al., 1993).
GeoJSON
Fossils
Age
Depositional setting
Additional Information