Beej Averitt and Paul Averitt provides photographic evidence for New World mastodons in The Desert Magazine.
Beej Averitt and Paul Averitt, “Mastodon of Moab,” The Desert Magazine (August 1947); 24–27
[Abstract] Deep in the canyon of the Colorado below Moab, Utah, there is a strange carving of an extinct mastodon, placed there by an Indian artisan whose people left numerous other evidences of their passing. Although only a few miles from a traveled highway, these relics are seldom visited. Beej and Paul Averitt who have paid many visits to the desert country of southeastern Utah, here record the results of an interesting expedition.