K kettle 31 L Laramide Revolution 82 lateral moraine 30 layered gneisses 51 Little Ice Age 112 loess 108 M magma 60 magnetite 52 marine sedimentary rocks 21 metamorphic rocks 53 muscovite 55 N normal fault 39 nunatak 111 O obsidian 101 oreodonts 97 outwash 31 outwash plain 31 outwash terraces 34 P pegmatite 56 period 46 Pinedale Glaciation 109 Q quartzite 63 R reverse fault 39 rhyolite 100 rock glaciers 26 S schist 51 sedimentary rocks 45 series 47 serpentine 55 “soapstone” 55 Sundance Sea 79 systems 46