American paleontologist (1875–1957).
William Henry Twenhofel (16 April 1875 – 4 January 1957) was an American sedimentary geologist who wrote a landmark text Treatise on Sedimentation (1926) which went into more editions. He served for many years as a professor of geology at the University of Wisconsin. The Society of Economic Paleontologists and Mineralogists instituted the Twenhofel Medal in his memory. Twenhofel was born in Covington, Kentucky, to German-immigrant farming family of Helena Steuwer and Ernst A. H. J. Twenhofel. He grew up working on the farm and was educated at local public schools. From 1896, he taught in local