The American Journal of Science, Band 251

1952 John Wiley abundant Algonquin assemblage axes basaltic basin beach ridges beds biocoenosis breccia brucite Cary cave cent clay minerals cliff colloidal column Cook County Creek crystals curves deformation deposits Deronda differentiation dolerite dolerite-pegmatite Espinaso volcanics feet figure formation fraction fragments Geol Geological Survey Geology glacial grains Grand Marais gravel hydrotalcite igneous Illite Illite and Montmorillonite intrusive Island jadeite Jour K₂O Kaolinite Lake Chicago lamellae lava limburgite loam loess lower marine material maximum miles Montmorillonite Montmorillonite Illite Nipissing orientation pahoehoe parallel periclase phase plagioclase plane plate Pleistocene Podzolic Podzolic soil group present pressure pyroxene quartz ratio region River samples sedimentary sediments shale shear-joints Shoreline features sill silt size-frequency distribution slope spinel structure surface Tech temperature thick thin section tion twinned Valders Valley W. H. Herdsman Whin Sill Wisconsin Yellow Podzolic soil