El Fin del Mundo with location of locality 1 (black area at east end is the excavation), nonarchaeological localities 3 and 4 (1 and 3 are in an arroyo system), and the areas of the upland Clovis camp (2, 5, 8, 9, 10, 22). Inset shows location of the site (El Fin del Mundo, FdM) in northern Mexico relative to the Clovis mammoth kills in the upper San Pedro Valley (SPV) of southern Arizona.