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
Chief of police An alternative and lesser-used solution is to make the office of sheriff a purely ceremonial one. One other solution, an example of which is seen in the case of the Las Vegas Metropolitan Police Department, is to provide for the sheriff to simultaneously serve as the chief of police, thus remaining as the chief law enforcement officer (CLEO) of the county. The police chief of a small town may be the only paid employee of the police department and have a staff consisting only of volunteers when available. Conversely the police chief of a major city may have thousands or