A.J. Feulner | Geology Reports

USGS1961

Geology and ground-water resources of Clayton County, Iowa

Clayton County includes 784 square miles in northeastern Iowa and in 1960 had a population of 21, 962. For the most part, the county is a dissected upland that is drained mainly by the southeastward flowing Turkey River and its principal tributary, the Volga River. The Turkey River empties into the Mississippi River, which flows southward along the eastern border of the county. The climate is humid continental, and the average annual precipitation is 33.01 inches. The economy of the county is based on farming and the raising of livestock. The natural resources of the county include soil, water, rock, sand, and timber.

Iowa↗

USGS1960

Occurrence of strontium in the surface and ground waters of Champaign county, Ohio

Naturally occurring strontium was found in both surface and ground waters during an investigation of the water resources of Champaign County , Ohio . The strontium is related to the presence of celestite ( strontium sulfate) in rocks associated with evaporite deposition. The principal source of celestite in Ohio is in rocks of Late Silurian age. Celestite is present also in the glacial deposits of western Ohio , which contain rock material of Late Silurian age. Total time in contact with the rock material seems to have a large effect upon concentrations of strontium in ground water . Streamflow, during low-flow periods, is made up largely of ground - water seepage and contains detectable strontium . Strontium has been found in ground water in other counties in western Ohio and in the brines of eastern Ohio .

Ohio↗