Geology of the Alton Quadrangle, New Hampshire
New Hampshire State Planning and Development Commission, 1961 - Geology - 33 pages
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50 cents accumulated aeromagnetic survey ago Erosion Alonzo Quinn Alton quadrangle andalusite crystals Binary granite biotite Blue Hills Range Blue Job clay coarse-grained contours Conway granite corner crops DEVELOPMENT COMMISSION Devonian period Farmington feldspar folded foliated geologic map gneisses grains H. M. Bannerman Hampshire Hampshire Plutonic Series Hampshire State Planning hornblende igneous rocks illus inch inland sea Jenness Pond member Katharine Fowler-Billings Lawrence Goldthwait Littleton formation ln places lntrusion magma magnetic minerals Marland 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 PLANNING AND DEVELOPMENT pyrrhotite pyrrhotitic schist quartz diorite quartzite Reprinted 1949 road sand and gravel schists sedimentary rocks sediments shales shown sillimanite southeast Southeastern New Hampshire Spaulding Turnpike Strafford strike and dip T. R. Meyers true north U. S. Route underlain village of Farmington White Mountain Plutonic Winnipesaukee quartz diorite