Bulletin of the Geological Society of America, Bind 12,Del 1–128

15 feet Apple river ashes basin biotite channel clay cleavage cliffs color cone crater decayed deposits depth drainage east eroded erosion eruption esker feet deep feet in diameter feldspar flow formed GEOL Geological giants glacial drift glacial lakes Glacial period glacial potholes glacier gneiss gorges granite gravel groundmass Hilo Ice age ice-lobe ice-sheet interglacial interglacial stage Interstate park kame Kilauea lake Saint Croix lake Superior lava Lower Dalles magnetite Mauna Loa miles long minerals Minnesota Minnesota Geological Survey minutes Mississippi modified drift Mokuaweoweo moraine moulin torrent mountain mouth nearly northeast northern observed outlet paper phenocrysts plagioclase porphyritic preglacial probably Professor Saint Croix Dalles Saint Croix Falls Saint Croix river Saint Croix valley Saint Paul sand side slope Society southward square miles subglacial stream Sunrise river surface Survey Taylors Falls Tertiary tributary Upper Dalles vertical volcanic waterworn Western Superior Wisconsin