Charles Rollin Keyes (December 24, 1864[1]–1942) was a U.S. geologist and in 1918 was a U.S. Senate candidate in Iowa.
He served as Assistant State Geologist of Iowa, Director of the Bureau of Geology and Mines of Missouri and was president of the New Mexico Institute of Mining and Technology at Socorro.
[2] Keyes was also an avid ornithologist, publishing the first detailed listing of birds in Iowa in 1889.
In 1918 he was the Democratic candidate for the U.S. Senate from Iowa, losing to William S. Kenyon.
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