Masonry near the ground surface can be severely damaged by the effects of poor drainage and repeated freezing and thawing. When these damaged stones can no longer support the weight of the wall above them, they are replaced with stones of similar size, shape, color, and surface texture. Replacing a few eroded stones at the base of a wall will protect the upper second and third stories of the building.
Did You Know?
Many of the animal mounds you see at Chaco were made by Ord's kangaroo rats. They often dig in the soft midden (trash) areas in sites because they are elevated, easy to dig in, and don’t flood. In their colonies there are often more burrow openings than there are rats! (Drawing courtesy: ICWDM.org)