Diorite porphyrite

Rock type: 
97 millions 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 × 2.5 mm in size. In the second photo, magnification * 10. Upper Cretaceous.


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