Annual Report for ... with Accompanying Papers, Band 37

1/4 section 32 millimeters Adams county Afton Aftonian average beds boulders carbonates cement cent centimeters in diameter clay colored Creek cross-bedding depth Douglas township drift area elevation erosion feet thick figure Geological glacial glacier grades gravel deposits gravel is exposed gray gypsum horizon Illinoian inches included interglacial Iowa Geol Iowan drift Iowan gravel iron oxide Jasper township Kansan drift Kansan gravel Kansan gumbotil layer leached limestone loess Loveland Loveland gravel Mankato Mankato drift masses material mechanical analysis Middle Nodaway River miles millimeters in diameter Mitchell county Nebraskan Nebraskan gravel Nebraskan gumbotil northwestern Iowa overburden overlying peat pebbles Pennsylvanian Peorian Peorian loess Pleistocene pollen PRODUCTION IN IOWA Quarry quarter of section rocks sand and gravel sandstone shale Short tons shown silt slope soil stratified stream surface Survey thin Tons Value Tons Union county unleached upland gravel upper valleys Value Tons Value Washington township weathered western Iowa