Sandstone

Russia, Stavropol Territory, canyon of the river Dry Olkhovka. Limestones, limestones sandstones, oolitic limestones, interlayers of marls. Fossil: Thurmanniceras cf. thurmanni Pict., Phasianela personi Chaff., Purpuroidea longa Pcel., Grammatodon cabadinensis Mordv. Lower Cretaceous. Valanginian

Russia, Khabarovsk Territory, small Khekhtsir range. Fine-grained sandstones of greenish-gray color. Pivanskaya series. Thickness - 1500 metres. Lower Cretaceous. Valanginian.

Russia, Caucasus, Karachay-Cherkess Republic, Khasaut River Valley. 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.

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.

Russia, Caucasus, Karachay-Cherkess Republic, Khasaut River Valley. Gray, lilac-gray quartzites and arkose sandstones. Silurian. Llandovery (?)

Russia, Caucasus, Karachay-Cherkess Republic, Khasaut River Valley. 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.

Russia, Caucasus, Karachay-Cherkess Republic, Khasaut River Valley. 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.

Russia, Caucasus, Karachay-Cherkess Republic, Khasaut River Valley. 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.

Russia, Stavropol Territory, canyon of the river Alikonovka. Limestones, limestones sandstones, oolitic limestones, interlayers of marls. Fossil: Thurmanniceras cf. thurmanni Pict., Phasianela personi Chaff., Purpuroidea longa Pcel., Grammatodon cabadinensis Mordv. Lower Cretaceous. Valanginian

Russia, Karachay-Cherkess Republic, canyon of the river Alikonovka. Limestones, limestones sandstones, oolitic limestones, interlayers of marls. Fossil: Thurmanniceras cf. thurmanni Pict., Phasianela personi Chaff., Purpuroidea longa Pcel., Grammatodon cabadinensis Mordv. Lower Cretaceous. Valanginian