Basalt

Russia, Khabarovsk Territory, the right slope of the Kiya river valley. Form a cover. Porous olivine, pyroxene-olivine basalts and basaltic andesites. Olivine forms idiomorphic crystals 0.2-1.5 mm in size, partially or completely replaced by iddingsite, rhombic pyroxene is in the form of tabular grains 0.5-1.5 mm in size. The age of the rocks is 15 million years. Sovgavanskaya series. Pliocene.