M Mack, Colo., _15_, 17 Mancos Shale, 18, _56_, 72 view, _57_ Maps, _87_ geologic, 22 photo index, 58 road guide, 5, _6_ Marble Canyon, 12 Meeker, Colo., 64 Meeker Massacre, 10 Mesas, 1 Mesaverde Group, 56, 57, 129 landslide, view, _57_ Mesaverde National Park, 129 Mesozoic Era, 27 Metamorphic rocks, 18 _See also_ Proterozoic rocks. Mica mine, 122 Miller, Laura Hazel, cave dweller, 13 Minerals, agate, 53 bentonite, 49 calcite, 21, 35 chert, 38 clays, 8, 49, 55, 69 coal, 55, 56, 57, 89 desert varnish, _8_, 32, 69 gypsum, 45 hematite, 21 kaolinite, 55 mica, 122 silica, 35 uranium ore, 28, 49 vanadium ore, 49 Mining, building stones, 105 Cameo, 57 coal, 57 Devils Canyon, 13 Kodels Canyon, 12 Ladder Canyon, 122 mica, 122