American palynologist known for his work on the vegetation history of the North American Pacific Northwest. He was the dean of Graduate Studies at Oregon State University from 1949 to 1972.
He received a Bachelor's degree from the University of Wisconsin-Madison.
He began teaching at Oregon State University in 1939 and he published his seminal work, Postglacial Forest Succession, Climate, and Chronology in the Pacific Northwest, in 1947.
He had five children with his wife Helen.
He was a fan of the work of Charles Darwin.