| Vertebrate fossil spotted several years ago in exposures of the late Miocene Dove Spring Formation that at that date occurred well outside the boundaries of Red Rock Canyon State Park on Public Lands administered by the Bureau of Land Management; today, the bone-bearing exposures where this specimen had weathered out on the surface now lie within the rather recently expanded borders of Red Rock Canyon State Park, California. |
| Here is a closeup of the grinding surface of is same horse tooth seen in the previous image; it's from the Late Miocene Dove Spring Formation of the Ricardo Group, El Paso Mountains, Kern County, California; in actual size, the ginding surface is is 22mm across. |