Isfarin Fm
Type Locality and Naming
Along the Isfara River, Turkestan-Alay Mountain region, S. Fergana. O.I. Nikiforova, 1937 (329, pp. 5-62). Stratotype on the Isfara River, south of the Matchay (October) settlement. Initially distinguished at the level of layers. In 1958 (467), A.E. Dovzhikov et al. distinguished the Matchay Fm, which included the Isfarin Fm.
Synonym: Isfarinskaya Suite, Исфаринская св.
Lithology and Thickness
Thin-bedded and platy clayey limestones with horizons of thick-bedded and massive organogenic varieties and interlayers of silty (aleurolites) and clayey slates of greenish-gray, gray, and brown colors. Thickness 560-600m.
Relationships and Distribution
Lower contact
Conformably overlies the pentamerous limestones of the Dalian Mountains
Upper contact
Conformably overlain by the limestones of the Kunjak Mountains
Regional extent
Southern Fergana.
GeoJSON
Fossils
Contains stromatoporoids - Intexodictyon bavaliense posochovae Less., Favosites effusus Klaam., F. ferganensis Orlov, F. weberi Orlov, Squameofavosites ettkichuensis Chekh., Emmonsiella saaminica (Chekh.), Heliolites ex gr. interstinctus Linne, Atrypella prunum Dolm., Eoreticularia tschernyschevi mattchensis Nikif., Nikiforovaene linxoides Nikif., Tadschikia wilsoniaformis Nikif., Encrinurus ex gr. punctatus Wahl., Colonograptus sp., Pristiograptus sp., Monograptus transgrediens, etc.
Age
Depositional setting
Additional Information