The American Geologist, Volume 6Newton Horace Winchell Geological Publishing Company, 1890 Includes section "Review of recent geological literature." |
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AMERICAN GEOLOGIST Archean artesian augite azygous plate basal plates basin beaks beds calyx Canada Carboniferous coal contains coöperation Cordilleran glacier Cretaceous crinoids crystals Dakota Dana deposits described diabase dike diorite east eastern elevation Emmons evidence fauna feet five formation fossils genera genus Geol Geological Society Geological Survey geologists Glacial period glaciers gneiss hight hornblende Huronian ice-sheet iron islands lake limestone lower magnetite mass miles mineral Monticulipora mountains national survey nearly Nicholson Olenellus olivine outcrops Owen paleozoic paper Paradoxides Paradoxides zone plagioclase portion present Primary radials primordial probably Prof quartz quartzite referred region regular interradials river rocks sandstone schists Schmidtia scientific shales shell side Silurian slate slope species specimens strata stratigraphic structure subradials surface Taconic Tertiary Texas thickness tion Trenton underbasals upper valley Walcott Whitella Winchell