Title: Geokhimii͡a︡ barii͡a︡ i stront͡s︡ii͡a︡ v vulkanogenno-osadochnykh kompleksakh dokembrii͡a︡
Subjects: Barium, Igneous Rocks, Sedimentary Rocks, Stratigraphic Geology, Strontium, Sedimentary rocks, Igneous rocks
Time periods: Precambrian