Sarbatyr-Paleog Formation

Sarbatyr-Paleog Fm

Period:

Paleogene, Neogene

Age Interval:

Rupelian- Aquitanian, K1-K9

Province:
Kyzylkum Region

Type Locality and Naming

Along the Sarbatur well, Central Kyzylkum. M.N. Gramm, 1959 (179, p.630).

Synonym: Sarbatyr Suite, Сарбатырская св.

Lithology and Thickness

Shallow marine red-colored and variegated clays, sands, sandstones, shell rocks.

R.K. Makarova (162; 283) in the section of the Ts. Kyzylkum distinguishes the following layers by mollusks:

1. LOWEST UNIT - Gray and red clays. Thickness 2-10m.

2. Red-colored clays and sandstones. Thickness 2-5m.

3. Red-colored and gray-colored clays, sands, sandstones. Thickness 5-10m.

4. Gray sands and sandstones with interlayers of variegated clays. Thickness 10-15m.

5. HIGHEST UNIT - Gray-colored sands and sandstones. Thickness 5m.

In the Ts. Kyzylkum, two subsuites are often distinguished in the section of the formation. The lower one is mainly composed of clays, the upper one of sands and sandstones.

Lithology Pattern:

Clayey sandstone

Relationships and Distribution

Lower contact

Lies with erosion on various horizons of the Eocene

Upper contact

With erosion is overlain by the Agitmin Fm

Regional extent

Developed in the depressions of the southern Aral region, Kyzylkum, Bukhara-Karshinsky region, Zirabulak-Ziaetdin and Nuratin districts. It is correlated with the Sum Fm of Fergana, Tashsay Fm of the Angren plateau.

GeoJSON

null

Fossils

The first (lowest) three subdivisions correspond to the Oligocene, the last two to the Lower Miocene.

According to the data of N.E. Minakova (458), the lower part of the Sargatyr-Paleog Fm are analogs of the foraminiferal lona Spiroplectammina carinata oligocenica. Then come deposits corresponding to the lona Spiroplectammina terekensis - Sphaeroidina variabilis. The uppermost part of the section of the Sargatyr-Paleog Fm, corresponding to the Lower Miocene, is distinguished in the lona Porosononion dendriticum and Cibicides ornatus.

In other districts, subsuites are not distinguished. Contains in the lower part marine bivalve mollusks - Chlamys Bifida Munst., Ch. Bifida lucida Goldf., Miocardiopsis ustjurtensis Iljina, Calista dubia Holzl., Nucula orbignyi Glib., N. peregrina Desh., Gari angusta Phil. and others; foraminifers - Cyclammina placenta (Reuss.), Haplophragmoides latidorsatus (Bronn.), Caucasina schischkinskyae Sam., Cribrononion krimholsy Balakhm., Cibicides ornatus Bogd.; in the upper part - Nucula comta Goldf., Nuculana gracilis Desh., Musculus sternbergensis Ander., Isocardia subtransversa subtransversa Orb., Cardium abundans Liver., C. serogosicum Nossov, Siligua bavarica Gbmb., Cyrtodaria angusta parva Speyer., Cyprina rotundata elliptica Speyer., Cardium levinae Merkl., Isocardia burdigalensis Desh., Corbula helmerseni Mikhail., Lentidium kuzhasaica Merkl.; foraminifers - Pararotalia canui (Cushm.), Discorbis propingus (Roem.), Elphidium subnodosum (Roem.), E. heltermanni Hand., Dentalina soluta Orb., Purrulina fusiformis (Roem.), Porozononion dendriticus (Chal.).

Age

The first (lowest) three subdivisions correspond to the Oligocene, the last two to the Lower Miocene. The boundary between the Oligocene and Miocene passes within the upper Sargatyr-Paleog Fm. M.N. Gramm attributed the formation to the Oligocene. The age of the formation is Oligocene-Lower Miocene (upper Rupelian-Sakaraulsky region).

Age Span:

Beginning stage:

Rupelian

Fraction up in beginning stage:

0.5

Beginning date (Ma):

30.60

Ending stage:

Aquitanian

Fraction up in the ending stage:

1.0

Ending date (Ma):

20.45

Depositional setting

Depositional pattern:

Additional Information

Compiler:

A.A. Abdusamatov, B.I. Pinhasov – In: GeoGPT translation of: “Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)”