A study of the origin and composition of Earth's crustal systems. Mineralogy, chemistry, and textures of rocks are learned through hand sample and microscopic analysis. Our study emphasizes interpretation of igneous, metamorphic, and sedimentary rock associations in relation to tectonic settings. Laboratory, one period. May include a multi-day field trip. Prerequisites: GEO*110 and GEO*240. GEO*120 is strongly recommended. Distribution Requirements: QR, SP.