Christina Chavez, third from right, works with teams throughout Sandia National Laboratories to consider effects on historic properties when carrying out or funding projects.

During a tour with a group of Sandia National Laboratories employees, archaeologist Christina Chavez shared that a site dates to the early 1900s due to purple glass found in the area. During the early 20th century, glass was tempered using the element Manganese, which turns purple after many years of being exposed to the sun. This color of the glass reveals the estimated timeframe when the glass was produced and left in the area.