doctoral_advisor death_place death_date work_institution birth_place nationality doctoral_students field birth_date known_for residence article_title name alma_mater
g. b. riggs corvallis , oregon october 8 , 1989 oregon state university la crosse , wisconsin , united states of america 20px american calvin j. heusser geology , botany , palynology april 28 , 1907 palynology , quaternary geology 20px united states of america henry paul hansen
 henry paul hansen university . -rrb- university of washington -lrb- ph.d. -rrb- of wisconsin -- madison -lrb- b.sc. , m.sc
henry paul hansen

henry paul hansen -lrb- april 28 , 1907 -- october 8 , 1989 -rrb- was an american palynologist known largely for his pioneering work on the vegetation history of the north american pacific northwest and for his time as the dean of graduate studies at oregon state university from 1949 - 1972 .
