Annual Report for ... with Accompanying PapersPublished for the Iowa Geological Survey, 1895 - Geology |
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arenaceous argillaceous Augusta blue bluff bluish boulders brecciated brown buff Burlington limestone calcareous Carboniferous Cedar chalk character CHARLES ROLLIN chert City Coal Measures color considerable Cretaceous deposits depth Devonian district Dolomite drift drillings east eastern exposed exposure extent feet thick fine-grained Foraminifera forms Fort Dodge Fort Madison fossils fragments geodes glacial grains gypsum heavily bedded inches indurated IOWA GEOLOGICAL SURVEY Keokuk Kinderhook layers ledge Lee county light gray lime lithological loess magnesian limestone massive material miles mineral Mississippi river Missouri Moines county Moines river Montrose mouth Niobrara northwestern occur Oneota outcrops outliers places PLATE portion quarry quartz railroad ravines region rock Saint Louis limestone Saint Peter samples sand sandstone sandy Shale short distance Silurian Sioux Skunk river soil southeastern Iowa strata stream Sugar creek surface thin tion township Upper Burlington Upper Silurian valley Warsaw yellow