L Labradorite, 110 Lake Bascom, 93 Lake beds, 22 Lake deposits, Triassic, 55 Lake Hadley, 5, 49, 52, 70 Lake Hadley, glacial bed, 59, 79 Lake, ice margin, 82 Lake shore, Amherst, 79 Lake shore, old, 7 Lake shore, slope of, 7, 49 Lake Springfield, 5, 49, 103 Lake Springfield, antiquity, 70 Lake Springfield, frozen, 70 Lakes, post-glacial, 49 Lakes, Triassic, 46, 56, 68, 101 Landslide deposits, 46 Landslide, Triassic, 56 Landslides, ancient, 19, 21 Lava, amygdaloidal, 104 Lava, columnar, 32 P, 60, 60 P, 71 Lava, Deerfield flow, 101 Lava field, 72 Lava flow, 25, 26, 28, 43, 44, 48, 60 Lava, Holyoke flow, 26, 44, 81, 85 Lava, pillow type, 96 Lava, “second,” 85 Lead veins, 30, 63, 65 Limestone, 35, 40, 114 Limestone, Bernardston, 40 Limestone, Cambrian, 38 Limestone, Devonian, 34, 35 Limonite, 111 Longmeadow sandstone, 18 Lowland, excavated, 13 Lowland, Miocene age, 55 Lowland relief, 53 M Malachite, 64 Marble, 118 Marble, Westfield, 61, 105 Maturity, 14 Meander, 3, 62 Meander scarps, 56, 57, 104 Meander scarps, Sunderland, 57 Meanders, Westfield River, 62 Microcline, 109 Microcline granite, 117 Mine, West Farms, 64 Mineral, definition, 106 Minerals, genetic classification, 107 Minerals, metamorphic, 111 Minerals, pegmatite, 109 Minerals, sedimentary, 111 Minerals, soil, 111 Minerals, vein, 63, 107 Mine shaft, 64 Miocene, 11, 14, 30, 55 Miocene lowland, 14 Monadnocks, 12 P, 55 Moraine, terminal, 8, 48 Mountain, eastern block, 19, 28 Mountain, exhumed, 48, 100 Mountain, Triassic, 21, 54 Mt. Warner rocks, 87 Muscovite, 109 N Natural levee, 2, 3 New England landscape, 15 New England peneplain, 12 P, 15, 45, 74, 92 P New England upland, 51, 55, 90, 94 New England upland, monadnocks, 55 Notch, 25 Notch, origin, 44, 74 Notch quarry, 84 O Olivine, 110 Ophicalcite, 118 Orchard land, 8 Ordovician, 36, 33, 39 Ox-bow, 3 Ox-bow Lake, 4 P, 82 P Paleozoic era, 42 Pegmatite, 28, 32, 82 Peneplain, erosional plain, 46 Peneplain, New England, 12 P, 15, 45, 74 Peridotite, 36, 38, 115 Piedmont plains, 40 Piracy by Farmington River, 47 Pitchblende, 110 Plains, lacustrine, 49 Plankton, Cambro-Ordovician, 36 Plants, Triassic, 22 Plateau-like upland, 11 Playa, 21, 22, 23, 46, 68 Pliocene, 10, 11 Pliocene uplift, 48 Providence basin, 33 Pyrite, 64, 108 Pyromorphite, 64 Q Quarry, Westfield Marble, 61, 62 Quartz, 30, 63, 107 Quartz porphyry, 116 Quartzite, Cheshire, 93 Quartzite conglomerate, 35