40 WILLIAM J. MILLER 
dikes are not sharp. At locality 5, close to the white dikes shown 
in Figure 3, the anorthosite-gabbro contains many roughly parallel 
Fic. 4.—Dikes of hornblendite filling curving cracks in anorthosite-gabbro, 
one-third of a mile south-southeast of the northern road. 
Fic. 5.—Ledge of granite containing curving cracks filled with pyroxenite dikes 
on the left side, and nearly vertical cracks filled with pyroxene-rich pegmatite dikes 
on the right side. Close to the very northern end of the anorthosite-gabbro area. 
curving cracks filled with small dikes of pure hornblendite (see 
Fig. 4). Still farther south, especially at localities 7, 11, 12, and 13, 
more cracks are filled with hornblendite dikes. 
