C2

Rock type: 
Age: 
320 millions years

Russia, Jewish Autonomous Region. Massive, colored siliceous rocks. Middle-Upper Carboniferous. Ulunskaya series. Thickness - 800 metres. In the rocks, the indefinite remains of radiolarians. Age is determined relatively. C<sub>2-3</sub>ul.

Rock type: 
Age: 
300 millions years

Sardinia, Burgos. Equigranular monzogranites granodiorites. Upper Carboniferous-Permian.

Rock type: 
Age: 
300 millions years

Volcano-sedimentary succession. Conglomerates, sandstones, with alternating epiclastic rocks, volcanic breccias, lacustrine limestones, with cherty levels and anthracite lenses, shales, with plants remains, sporomorphs and pollens, ostracods and amphibians. Upper Carboniferous. Moscovian, Kasimovian, Gzhelian.... (alternatively: Westphalian D (?) - Autunian. C2

Rock type: 
Age: 
300 millions years

Volcano-sedimentary succession. Conglomerates, sandstones, with alternating epiclastic rocks, volcanic breccias, lacustrine limestones, with cherty levels and anthracite lenses, shales, with plants remains, sporomorphs and pollens, ostracods and amphibians. Upper Carboniferous. Moscovian, Kasimovian, Gzhelian.... (alternatively: Westphalian D (?) - Autunian. C2

Rock type: 
Age: 
296 millions years

Jasper-like siliceous rocks. Volcanogenic-sedimentary deposits. Carboniferous? Voronezhskaya series. Fossil: radiolarians - Cenosphaera, Dorysphaera, Tricolocapsa, Dictyomitra, Lithomitra. In the lenses of limestone: Triticites aff. paraschwageriniformis Rasov., ex gr. arcticus (Shell.). C3vr. (C2 - IUGS)

Rock type: 
Age: 
296 millions years

Stratum bodies of diabase porphyrite in sedimentary rocks of the voronezhskoy series (C3vr - C2 IUGS). Сarboniferous?