Gezan Fm
Period:
Cretaceous
Age Interval:
Middle Turonian-Coniacian, Z1
Province:
Zarafshan-N.Gissar
Type Locality and Naming
Along the village of Gezan, Central Tajikistan. M.R. Jalilov, Yu.N. Andreyev, F.Kh. Hakimov, et al., 1971 (191, p.76). Stratotype near the village of Gezan, on the right bank of the Magian River.
Synonym: Gezanskaya Suite, Гезанская св.
Lithology and Thickness
At the bottom - brick-red siltstone (aleurolites) with layers of conglomerates and shell rocks
At the top - alternation of siltstone (aleurolites) and sandstones with clayey catuns and imprints of shells. Thickness 34-65 m.
Lithology Pattern:
Siltstone
Relationships and Distribution
Lower contact
It lies conformably on the Kuhistan Fm
Upper contact
It is conformably overlain by the Kuruk Fm.
Regional extent
Zarafshan district.
GeoJSON
null
Fossils
At the bottom - with marine bivalves - Ostrea vatonnei Thomas et Peron., Costeina costei (Coq.)
Age
It belongs to the middle Turonian - Coniacian. (56; 446; 452).
Age Span:
Beginning stage:
Turonian
Fraction up in beginning stage:
0.3
Beginning date (Ma):
92.55
Ending stage:
Coniacian
Fraction up in the ending stage:
0.2
Ending date (Ma):
88.65
Depositional setting
Depositional pattern:
Additional Information
Compiler:
I.M. Abdazimova – In: GeoGPT translation of: “Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)”