Annual Report for ... with Accompanying PapersPublished for the Iowa Geological Survey, 1901 - Geology |
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alluvium Anamosa bank bed rock blue clay bottom bowlder clay Braddyville brick buff building stone Burlington calcareous carbonate Carboniferous Cedar county chert Chonetes Clarinda Coal Measures Coggan color Council Bluffs Cretaceous crinoidal crinoidal limestone crystalline deep deposits depth Devonian drainage drift plain east erosion exposed exposures flood plain formation fossils fragments Fusulina Geol geological glacial Gower limestone grained gravel gray inches Iowa river Iowan Kansan drift laminated land layers ledges lime Linn Linn county loess Louisa county lower material miles Missouri Missourian Moines river Muscatine county Nishnabotna Nodaway outcrops Page county paha pebbles places Pleistocene Pottawattamie county Productus quarry ravine region ridges Saint Louis sand sandstone sandy seam seen shale silt slopes soft soil strata streams surface Tarkio thin Tipton township upland upper valley weathering yellow