North Muruntau Formation

North Muruntau Fm

Period:

Carboniferous

Age Interval:

Lower Moscovian, K6

Province:
Kyzylkum Region

Type Locality and Naming

In the northern part of Muruntau, Central Kyzylkum. A.K. Bukharin et al. in 1986 (1990).

Synonym: Severo-Muruntau Fm, Severomuruntau Fm, Severomuruntauskaya Suite, Северомурунтауская св.

Lithology and Thickness

Alternation of packets of gray and light-gray thin-bedded limestones, often organogenic. Thickness 250m.

Lithology Pattern:

Limestone

Relationships and Distribution

Lower contact

It conformably overlies the Belkuduk Fm

Upper contact

It is conformably overlain by the Azhriktin Fm – this Fm is in the Takhatau set.

Regional extent

Central Kyzylkum, northern foothills of the Muruntau Ridge. Separate fragments of this suite were described by Z.S. Rumyantseva (386) as the Bzdon Fm.

GeoJSON

null

Fossils

In the lower part contains foraminifers - Eostaffella acuta Gr. et Leb., Schubertella obscura Lee et Chen, Ozawainella alchevskiensis Pot., Pseudostaffella ex gr. gorskyi (Dutk.), Neostaffella uralica (Kir.), Profusulinella ex gr. parva (Lee et Chen), P. muruntavica Rum., Aljutovella aljutovica (Raus.), Skelnevatella skelnevatica (Putrja), S. artificialis (Leon.), Dagmarella prima Sol., Verella (?) bosdonica Rum., V. (?) imperplana Rum., Paraeofusulina trianguliformis (Putrja); brachiopods - Brachythyrina cf. orlicus Rot., Choristites cf. inferus Ivan., C. radiculosus A. et E. Ivan. In the lower part, foraminifers - Neostaffella subquadrata (Gr. et Leb.), N. umbilicata (Putrja), N. syzranica (Raus. et Saf.), N. latispiralis (Kir.), Ozawainella mosquensis Raus., O. maximensis Man., O. tingi (Lee et Chen), Profusulinella convoluta Lee et Chen, Ovatella constans (Saf.), Depratina paratimanica (Raus.), D. prisca (Depr.), D. prisca sphaeroidea (Raus.), Taitzehoella prolibrovichi (Raus.), T. pseudolibrovichi atelica (Raus.), Aljutovella saratovica (Putrja et Leon.), Skelnevatella isvarica (Putrja), S. cafirniganica (Bensh), Eofusulina triangula (Raus. et Bel.), E. corpulenta Rum. This complex corresponds to the Aljutovella priscoidea zone.

Age

Age Span:

Beginning stage:

Moscovian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

315.15

Ending stage:

Moscovian

Fraction up in the ending stage:

0.3

Ending date (Ma):

312.71

Depositional setting

Depositional pattern:

Additional Information

Compiler:

F.R. Beni – In: GeoGPT translation of: “Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)”