. "Kay, Marshall"@en . "George Marshall Kay"@en . . "Kay, George Marshall"@en . "1975Z"^^ . . "1975-09-03Z"^^ . . "Marshall Kay (1904\u20131975) was a geologist and professor at Columbia University. He is best known for his studies of the Ordovician of New York, Newfoundland, and Nevada, but his studies were global and he published widely on the stratigraphy of the middle and upper Ordovician. Kay's careful fieldwork provided much geological evidence for the theory of continental drift. He was awarded the Penrose Medal in 1971."@en . "American Geologist" . . . "1904-11-10Z"^^ . "1904Z"^^ . .