Annual Report for ... with Accompanying PapersPublished for the Iowa Geological Survey, 1902 - Geology |
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average bank blue bluff bowlder clay brecciated brick Buena Vista county calcareous calcining carbonate Carboniferous Cedar creek cement cent channel Cherokee Cherokee county Coal Measure shales Coal Measures color containing deposits depth Dielasma Dodge dolomitic drainage east erosion exposed exposure fine-grained Fire clay Fort Dodge fossils geological glacial gravel gypsum gypsum plaster Hall Henry county inches Iowa Iowa Geol iron Kansan drift Keokuk kiln lake layers ledges lime loess marl material miles mill mineral mines Moines river moraine northwest one-half Ottumwa outcrops places portion prairie production quarry quarter of section railroad ravine rock Saint Louis limestone sand sandstone seam Seminula shaft shale shaly Skunk river slope soil southwest Spirifer stone strata stream stucco surface Surv Tensile thin tion township tributaries unconformity uplands upper valley Walnut Walnut township Wapello Wapello county Webster county Wisconsin yellow