Andesite Phase Maps. Click on any map to open the Rock Library chemical map page for the sample (the hand sample will be visible first). Use the sidebar on the page you open to navigate through the images and maps.

K-84 Phase Map

andpm_001. Andesite thin section from Germany. Biotite (dark blue), augite (red), hornblende (brown), plagioclase (yellow), mesostasis (aqua). Krantz Collection at Smith College (K-84).



WS-29 Phase Map

andpm_002. Hornblende andesite from Mt. Shasta, CA. Pyroxene (pale blue), hornblende (brown), glass (blue), plagioclase (yellow). Wards Collection of North American Rocks. Smith College sample WS-29.