The Late Pleistocene paleoenvironment of the Basin of Mexico
Deinsea , Volume 9 - Issue 1 p. 267- 272
One of the most interesting and newest mammoth sites in Mexico is found in Tocuila, State of Mexico, east of Mexico City. Remains of at least five Plains mammoths (Mammuthus columbi), and other animals were found in deposits dated at approximately 11,200 yBP. The matrix in which the bones are embedded consists of a sandy silty sediment with pumice fragments associated with a catastrophic mud flow of volcanic origin.