James "Jim" Henry Madsen Jr. | |
|---|---|
| Born | 28 July 1932 |
| Died | 28 November 2009 (aged 77) Salt Lake City, Utah |
| Nationality | American |
| Alma mater | University of Utah |
| Known for | paleontology, Allosaurus, Ceratosaurus |
| Parent(s) | James Henry Madsen Sr., Eva Anna Weidner |
James "Jim" Henry Madsen Jr. (July 28, 1932 – November 28, 2009) was an American vertebrate paleontologist and geologist and main leader of excavations at the Cleveland-Lloyd Dinosaur Quarry in the 1960s. Madsen primarily worked to describe skeletons of Allosaurus from the quarry, eventually getting the site to become a National Natural Landmark in 1965 and a national monument after his death.[1][2][3]