PETROGRAPHY OF THE GNEISSES AND SCHISTS AND ASSOCIATED IGNEOUS 108
INTRUSIONS
The Gneisses and Schists 108
The Intrusive Rocks 123
_a._ The Older Granites 123
_b._ The Younger Intrusions 129
1. Granites and Pegmatites 129
2. Syenites and Diorites 135
3. Porphyries, Porphyrites, Diabases and Basalts 137