Valles Caldera Valles Caldera dates back to the prehistoric times: spear points dating to 11,000 years ago have been discovered. Several Native American tribes frequented the caldera, often seasonally for hunting and for obsidian, used for spear and arrow points. Obsidian from the caldera was traded by tribes across much of the Southwest. Eventually, Spanish and later Mexican settlers as well as the Navajo and other tribes came to the caldera seasonally for grazing with periodic clashes and raids. Later as the United States acquired New Mexico as part of the Treaty of Guadalupe Hidalgo in 1848, the caldera became the backdrop
547 Praxedis 547 Praxedis Praxedis (minor planet designation: 547 Praxedis), provisional designation , is a Postremian asteroid from the central regions of the asteroid belt, approximately 52 kilometers in diameter. The asteroid was discovered on 14 October 1904, by astronomer Paul Götz at the Heidelberg-Königstuhl State Observatory in southwest Germany. It was named from literature after the character "Praxedis" in Joseph Victor von Scheffel's historical romance "Ekkehard" (1857). The official naming citation was mentioned in "The Names of the Minor Planets" by Paul Herget in 1955 (). "Praxedis" is a member of the Postrema family (), a mid-sized central asteroid family of