#sediments
- River sands — The plural form of the regional noun arină; massive accumulations or expansions of fine sand, gravel, or granulated sedimentary deposits located on the bottom or banks of mountain rivers.
- Artinskian — An age or stage in the Cisuralian epoch of the Permian period, geochronologically dated between approximately 290 and 283 million years ago; relating to this stage. In theoretical geology, the term describes an era marked by major climate shifts and massive marine sediment depositions, originally defined in the Ural Mountains region of Russia.