Radiocarbon dates used in age models for TY and MHCP.

Note, UCIAMS 170149 was not used in the age model given the high error but is included in this table. Depths used in age models were adjusted from depth below datum to depth below surface to account for the uneven and slightly sloping surfaces of both rockshelters. Lab ID are: PSUAMS Pennsylvania State University AMS 14C Facility, UCIAMS Keck Carbon Cycle AMS Facility, and DAMS DirectAMS.com. Charcoal samples were prepared at Penn State University and the University of New Mexico Center for Stable Isotopes using standard ABA methods described elsewhere [54]. MHCP chronology is only presented below ~4500 BP.