Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
A. Geographical location of the XBQ site in this study. Map made with Natural Earth (https://www.naturalearthdata.com/downloads/50m-raster-data/50m-cross-blend-hypso/). B. A child buried in a stone coffin. C. The tooth was sectioned at the cementoenamel junction and a sample was drilled from the crown pulp chamber.
