Sandstone

Russia, Caucasus, Kabardino-Balkarian Republic, Harbas river valley. Quartz sandstones, with intercalations of siltstones and mudstones. At the base - coal layers. A coal seam is visible in the photo. Khumarrinskaya series. Thickness 240 meters. Fossil: Velopecten rollei Tate, Lima punctataSow., Circostylus euomphalus Quenst., Leda (Dacryomya) cf. graphica Tate, Astrate subtetragona Munst., Parallelodon aff. similis Terq., Hinnites sp. ind. (cf. davoei Dam.), Nucula cf. palmae Sow. Lower Jurassic. Sinemurian.