Andesite

Rock type: 
Age: 
115 millions 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.

Comments

Add new comment

CAPTCHA
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.