Annual Report for ... with Accompanying PapersPublished for the Iowa Geological Survey, 1896 - Geology |
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alluvium Anamosa Anamosa stage Appanoose Appanoose county arenaceous argillaceous Augusta beds bituminous blue bluffs Boone county boulders brick building stone calcareous Carboniferous Cedar Centerville Chariton Claire limestone clayey coal measures Cretaceous Crooked creek Dakota deposits depth dolomite drainage drift plain east English river erosion exposed exposures feet fine-grained Fire clay formation fossiliferous fossils G Rep Geol Geological glacial gravel gray hills horizon INCHES Iowa Jones county Kinderhook layers Le Claire ledges lime located loess lower Maquoketa Middle river miles mines Missouri Moines river Mystic coal occur outcrops Pentamerus Pleistocene points portion present quarry railroad railway ravine region ridges Riverside rock Saint Louis sand sandstone sandy seen shaft Shale Sioux City Skunk river slope soil southeast southwest Stone City strata stream surface thickness township upland upper usually valley Warren county Washington Woodbury county