From this viewpoint above the Palisades area, it is easy to see why people would choose to live there. The large, open terrace provided ample room to grow crops such as corn, beans, squash, and cotton. Many native plants growing nearby, such as prickly pear cactus, provided other sources of food. Look downriver from the Palisades site. Sand dunes and terraces line the Colorado River’s banks for miles. How many more archaeological sites may lie buried? Archaeologists continue to monitor these sites to detect whether they will continue to be threatened by erosion due to the continuing loss of sediment in the river corridor because of Glen Canyon Dam.