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Geology of the Road and Concrete Materials of Southern Iowa
Descriptions of Materials by Counties
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aggregate arenaceous argillaceous beds bluffs brown buff Burlington calcareous chert chips clay Coal County Creek crinoidal crystalline cubic yards dark gray deposits Depth in Feet Dolomite drab drift drilled exposed exposures feet above sea feet below sea feet thick fine-grained formation fossiliferous fragments gallons per minute Genevieve glacial glauconitic grains granular gravel gypsum hard and sound inches Iowa Iowa Geological Survey Kansan Keokuk Kinderhook ledge light gray lime loess Louis limestone lower magnesian Maquoketa Marion Township Mississippian Missouri series Moines River outcrops overburden Pennsylvanian percent Percentage of wear pieces sound Pleistocene Prairie du Chien pyrite quantity quarry quartz rapid effervescence road or concrete road surfacing rock Saint Peter samples sand and gravel Sandstone sandy sea level section 28 shale shaly shows similar Skunk River soft stone strata SWJ section thin Township Union Township valley yellow