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.
Russia, Khabarovsk Territory. Stock diorite porphyrites. Butakano-Churkinsky complex. Greenish-gray and dark gray with a greenish tint porphyry rocks with a different number of plagioclase phenocrysts in the microcrystalline bulk consisting of a plagioclase sheet, chlorinated biotite flakes and hornblende. Plagioclase phenocrysts are represented by zonal andesine tablets, sometimes albitized along cracks. The hornblende, also present in phenocrysts, is represented by idiomorphic grains 1 × 4 mm in size.
Russia, Khabarovsk Territory. Stock diorite porphyrites. Butakano-Churkinsky complex. Greenish-gray and dark gray with a greenish tint porphyry rocks with a different number of plagioclase phenocrysts in the microcrystalline bulk consisting of a plagioclase sheet, chlorinated biotite flakes and hornblende. Plagioclase phenocrysts are represented by zonal andesine tablets, sometimes albitized along cracks. The hornblende, also present in phenocrysts, is represented by idiomorphic grains 1 × 2.5 mm in size. In the second photo, magnification * 10. Upper Cretaceous.
Russia, Khabarovsk Territory. Stock diorite porphyrites. Butakano-Churkinsky complex. Greenish-gray and dark gray with a greenish tint porphyry rocks with a different number of plagioclase phenocrysts in the microcrystalline bulk consisting of a plagioclase sheet, chlorinated biotite flakes and hornblende. Plagioclase phenocrysts are represented by zonal andesine tablets, sometimes albitized along cracks. The hornblende, also present in phenocrysts, is represented by idiomorphic grains 1 × 2.5 mm in size. In the second photo, magnification * 10. Upper Cretaceous.
