Byerly, Perry

Byerly, Perry (Edward)

(1897–1978) seismologist; born in Clarinda, Iowa. His career at the University of California: Berkeley (1925–64) included the directorship of its seismographic station (1950–62). From examining travel-time curves of western North American earthquake waves, he postulated that the earth's mantle is discretely layered and penetrated by the base structures of mountains.
The Cambridge Dictionary of American Biography, by John S. Bowman. Copyright © Cambridge University Press 1995. Reproduced with permission.