Massaget Gr

Includes in Fergana Valley, Isfara River

Synonym: Massaget series

Reference section:

Lower part – Shurysay-Fergana Fm, middle part - siltstone, upper part – silty with gypsum.

Lower part -- See Shurysai layers Fm entry.

The Middle part of the Massaget series is composed of ochre-red siltstones with lenses of gravelites and conglomerates. At the top of the section, there are interbeds of gypsum and rock salt. In the northwest of the South Fergana region, in the mountains of Akchop-Akbet-Supetau, their thickness reaches 1900 m. In the Karamazar region, as well as in the south of the South Fergana and the north of the Turkestan regions (Isfara, Shurab, Sary-Rakho), they are partially or completely eroded.

The Upper part of the Massaget series in the mountains of Akchop-Akbelt-Supetau is composed at the bottom of dark brown-red siltstones with interbeds of grey sandstones, less frequently gravelites and gypsum (1050 m), at the top - coarser and lighter arenaceous siltstones (= sandy siltstone) with interbeds of green and greenish-grey siltstones and gypsum (1600 m). Their thickness is 2600 m. In the south of the South Fergana and in the north of the Turkestan region, this section of the section is represented by uniform brown-red sandstones with interbeds of ochre-red siltstones in clays, with a thickness of 200-900 m.

Charophyte algae, freshwater gastropods, and ostracods