Russia, Amur Region, Mikhailovsky Pillars. Andesites - dark gray, greenish-gray rocks, with a massive, fluid texture. Porphyry phenocrysts up to 20%. Consist: andesine, hornblende, augite. Bulk - volcanic glass. Lower Cretaceous. Determination of absolute age - 115 million years.
Russia, Amur Region, Sergeyevskiye Pillars. Andesites - dark gray, greenish-gray rocks, with a massive, fluid texture. Porphyry phenocrysts up to 20%. Consist: andesine, hornblende, augite. Bulk - volcanic glass. Lower Cretaceous. Determination of absolute age - 115 million years.
Russia, Amur Region, Mikhailovsky Pillars. Andesites - dark gray, greenish-gray rocks, with a massive, fluid texture. Porphyry phenocrysts up to 20%. Consist: andesine, hornblende, augite. Bulk - volcanic glass. Lower Cretaceous. Determination of absolute age - 115 million years.
Russia, Amur Region, Mikhailovsky Pillars. Andesites - dark gray, greenish-gray rocks, with a massive, fluid texture. Porphyry phenocrysts up to 20%. Consist: andesine, hornblende, augite. Bulk - volcanic glass. Lower Cretaceous. Determination of absolute age - 115 million years.