sedimentology

Dedication to the memory of a colleague, Doctor of Geological and Mineralogical Sciences Valentin P. Tverdokhlebov, a well-known specialist in sedimentology and palaeogeography of the Late Permian and Triassic of the Eastern Russian Plate and Southern Urals, as well as taphonomy of vertebrate localities. Valentin Petrovich is a long-time head of the geological survey party investigating the stratigraphy of continental red-coloured strata, tectonics and placement of minerals in the Orenburg region.

The authors consider compositions of the rocks penetrated with the Well NO 13 in the Gremyachkinskoye sylvinite field, Volgograd Region. Varied complexes of terrigenous, ciliceous and carbonate rocks, alongside with their mixed varieties rhythmically alternate there over the Late Cretaceous, Paleogene, Neogene and Quaternary sections.