Max Uhle was one of the first to do work on the site in 1902, and then Nelson sought to confirm Uhle’s findings (Nelson 1906). The third excavation was led by Schneck (1926). All three excavations are important but what made Nelson’s excavation unique was that, “Nelson carefully recorded provenience information for the specimens he collected, including vertebrate remains and bulk sediment samples, and most of these materials remain at the Phoebe A. Hearst Museum, stratigraphic analyses can still be conducted with these data” (Nelson 1906 p. VI). Also, Nelson provided great insight after excavation as to what formation processes were present, specifically looking at