Fig. 1. Geologic map of the Sharpners Pond tonalite, containing a biotite facies (sbt, orange), a biotite-hornblende facies (sbh, light-green), and a hornblende facies (sd, dark-green). An un-named adamellite-granodiorite (ysa, blue) and the Newburyport quartz diorite (nqd, pinkish-red) are also shown. Modified after Fig. 7.7 of Harrison et al.(1983).