Geology of the Alton Quadrangle, New Hampshire |
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accumulated aeromagnetic survey Alton Bay Alton quadrangle andalusite crystals beds Binary granite biotite Blue Hills Range Blue Job clay coarse-grained contours Conway granite corner crops deformed DEVELOPMENT COMMISSION Devonian period Early Devonian Farmington feldspar folded foliated geologic map gneisses granite porphyry H. M. Bannerman Hampshire Plutonic Series HAMPSHIRE STATE PLANNING hornblende igneous rocks illus Inland Sea Jenness Pond member Lake Winnipesaukee lines Littleton formation magma magnetic minerals medium-grained Merrymeeting Lake metamorphic rocks mica miles million years ago Mountain Plutonic Series mud and sand muscovite northwest occurs orthoclase Parker Mountain pegmatite Pittsfield member places PLANNING AND DEVELOPMENT pyrrhotite pyrrhotitic schist quartz diorite quartz-mica schist quartzite Reprinted 1949 schists schists and gneisses sedimentary rocks sediments shales shown sillimanite southeast Southeastern New Hampshire Spaulding Turnpike Strafford strike and dip T. R. Meyers thick topographic map true north U. S. Route underlain valleys village of Farmington White Mountain Plutonic Winnipesaukee quartz diorite