Philip R. Bjork

Philip Reese Bjork is an American geologist and paleontologist known for his work in unearthing dinosaur species in America.

Bjork received his undergraduate degree at the University of Michigan. Bjork's Master's thesis was on the vertebrate fossils of the Slim Buttes. He was a professor at the South Dakota School of Mines and Technology in Rapid City, South Dakota, as well as serving as director of their Museum of Geology from 1975 to 2000. His academic focus was on Cretaceous dinosaurs and mammals from the Cretaceous and early Cenozoic.