World rocks photo collection
Russia, Caucasus, Karachay-Cherkess Republic, Khasaut River Valley. Gray, lilac-gray quartzites and arkose sandstones. Silurian. Llandovery (?)
In the first photo, in the background (distant cliffs) - Light gray quartz and polymictic sandstones, with mudstones, siltstones and interbeds of coal. Fossil: Velopecten rollei Tate, Lima punctata Sow., Circostylus euomphalus Quenst., Leda (Dacryomya) cf. graphica Tate, Astarte subtetragona Minst., Parallelodon aff. similis Terq., Hinnites sp. ind. (cf. davoei Dam), Nucula cf. palmae Sow. Lower Jurassic. Pliensbachian.
