The New International Encyclopædia…
“ A line of granites and diorites appears near the coast west of the Piscataqua, and through the centre of the State, running west of the Merrimac Vallev toward the White Mountains, there are extensive outcrops of porphyritic gneiss. The heart of the White Mountains themselves is composed mainly of granite. Few regions exhibit more well-marked evidences of glacial action than New Hampshire. The rocks are everywhere striated, and boulders of all sizes are scattered all over the State, even on the mountain summits. ”
