Trampling experiments in the search for the earliest Americans
Experiments were undertaken to evaluate a natural versus cultural origin for a set of modified pebbles and cobbles found in pre-Clovis-age contexts at the Big Eddy site (23CE426) in southwest Missouri, U.S.A. Two experiments involving Asian elephants and American bison provided evidence that pre-Clovis-age modified cobbles, pebbles, and flakes probably were produced by the trampling of large mammals traversing alluvial gravel bars in search of food and water in a riparian environment. The production of "zoofacts" and behavioral aspects of elephants are described with respect to research on the earliest Americans.
Sociology and Anthropology
Lopinot, Neal H., and Jack H. Ray. "Trampling experiments in the search for the earliest Americans." American Antiquity (2007): 771-782.