Fig. 6. Trends in the Al-Ti-Zr projection for Al-rich shales through sandstones, including immature sandstones (IMS) and for fields of calc-alkalic suites (CAS) and strongly peraluminous granites (SPG); from Garcia and others (1994). Data from shales, slates, schists, and high-grade gneisses from the Littleton Formation in New Hampshire (MEQ) are outlined by dashed contour (Shaw, 1956).