| 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. |
| A closeup of the grinding surface of the 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. Part of the surface is obscured by a natural silcified cementing; in actual size, the grinding surface is 27mm across. |