American palynologist known for his focus on the vegetation history of the UNITED STATES Pacific Northwest. He was the dean of Graduate Research at Oregon Condition College or university from 1949 to 1972. He received a Bachelor’s level from the College or university of Wisconsin-Madison. He started teaching at Oregon Condition College or university in 1939 and he released his seminal function, Postglacial Forest Succession, Environment, and Chronology within the Pacific Northwest, in 1947. He previously five children along with his wife Helen. He was a enthusiast of the task of Charles Darwin.