Abstract Expressionist and Color Field painter whose best known works included "1957-D No. 1" and "1947-Y-No. 2." Revered by the first generation of Abstract Expressionists.
He was educated primarily on the West Coast, which was unusual for Abstract Expressionists, many of whom hailed from New York.
He taught at the California School of Fine Arts.
He was born in North Dakota and raised in Spokane, Washington. He married his second wife, Patricia Alice Garske, in 1957 and remained with her until his death in 1980.
He was a friend of the renowned artist Jackson Pollock.