Chapter I

Ice Age, 10, 48, 56
Icebergs, 8
Ice-cakes, 8
Ice dispersal centers, 48
Ice recession, rate, 49
Ice sheet, 5, 9, 52, 72
Ice thickness, 48
Indian campsites, 3
Indian graves, 3
Intrusive, 33
Inundation, 3
Iron ore, 34, 35

J
Joints, Mt. Sugarloaf, 56
Jurassic period, 46

K
Kame terraces, 82, 95
Kaolinite, 111
Kettle holes, 82, 83, 100
Kyanite, 111

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