Everett C. Olson

Everett C. Olson was a prominent vertebrate paleontologist whose research focused heavily on Permian terrestrial animals, particularly early synapsids and reptiles. His extensive work helped document the massive evolutionary transition of land animals leading up to the Mesozoic era.

Olson served as a distinguished professor of zoology and paleontology at the University of California, Los Angeles (UCLA) for much of his career. Prior to UCLA, he also spent a significant period working at the University of Chicago, deeply influencing the study of evolutionary biology.

Olson's Extinction refers to a massive, localized extinction event during the late Permian period that he first identified and documented in the fossil record. It specifically wiped out a vast majority of the primitive synapsids and terrestrial vertebrates, altering land ecosystems before the more famous End-Permian mass extinction.

Yes, Olson was a pioneer in using the geographic distribution of fossil mammals to investigate early concepts of plate tectonics and continental drift. By mapping where identical ancient vertebrate fossils were found across separated continents, he provided critical biological evidence supporting the theory that landmasses were once joined together.