You could also add that Chicoma Peak is a small fraction of the northeast slope of an extinct, collapsed volcano. The Jemez Mtns. used to part one mountain that rose at least 20,000 ft. above sea level around 1 million years ago. The mountain collapsed and sent rocks as big as houses 300-400 miles south. There used to be a crater lake surrounded by the Jemez Mtns. but the southwest part of the mountains ruptured, creating Jemez Canyon. If you follow the slope of Chicoma Peak you can imagine how large the old mountain used to be.