Rabut Fm

Along the R. Rabut, Turkestan ridge. B.V. Yaskovich in 1959 (457, p.13), the volume of the sv. was clarified by R.N. Abdullaev et al., 1977 (35, p.22-23). Lectostratotype on the left bank of the Rabut River.

Synonym: Rabut Suite, Рабутская св.

In the lower part of its section, thin-bedded clayey limestones of dark gray and brown color, interbedded with clayey slates of gray and dark gray color, gray limestones with rare layers of fine-grained calcareous sandstone. Thickness is about 500 m.

[Above] on the Mayan stage, rocks with conglomeratic limestones at the base, thin-bedded limestones and slates of gray and brownish-gray color with layers of dark quartz-siliceous rock. Thickness is 60-100 m.

In the limestones, trilobites of the Mayan stage - Hypagnostus mirandus Hajr., H. brevifrons (Ang.), H. truncatus (Brog.), Linguagnostus tricuspis Lerm., L. kjerulfi (Brog.), Clavagnostus dentatus Hajr., Peronopsis Fallax (Linnr.) (480).

In the limestones, Late Cambrian trilobites Homagnostus ex gr. obesus Belt., H. asiaticus Hajr., Onchonotellus oburdonicus Hajr., Prochuangia minuscula Hajr. (480). In the upper reaches of Zagogtay, on this level, there are brachiopods of the Lower Cambrian - Lingulella sp., Apsotreta sp., Acrothele sp., Paterina sp., Micromitra sp.