Basaltic andesite is a black volcanic rock containing about 55% silica. It is distant from basalt and andesite in having a different percentage of silica content. Minerals in basaltic andesite include olivine, augite and plagioclase. Basaltic andesite can be found in volcanoes around the world, including in Central America and the Andes of South America. Basaltic andesite is common in the volcanoes near McKenzie Pass in Oregon, United States.
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