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Three Sister Research Paper

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I picked the Three Sisters because it was really cool how three volcanoes were right by each other. The Three sisters is a complex volcano, its made up of stratovolcanoes and shield volcanoes. All of the volcanoes are in Oregon. The Three Sisters got their name because there are three of them by each other. The oldest volcano is called Broken Top also known as South Sister. South Sister is the smallest and the youngest. South Sister is a stratovolcano. Located in Deschutes County, Oregon and Lane County. South Sister in Cascade Range. South Sister is elevated between 9,175 feet high. The prominence is 2.175 feet. It erodes basalt and andesite. South Sister was made in 1910 by a earthquakes. Charles Whittlesey, Thomas Eliot, and Harley Prouty.

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