caldera

The Spanish word caldera, also spelled caldero, has varied meanings in the American Southwest and throughout Mexico. While the literal translation is “pot” or “kettle,” in south and west Texas the term also means a cotton gin or steam engine. In ranch country, vaqueros call a bucket of feed a caldera. As a landscape term it is used to describe a volcanic phenomenon in which the violent propelling of magma creates a sudden void within the vent, thus allowing rock and molten debris encircling the vent to implode inward, forming a kettle-shaped orifice, as in the Valles Caldera National Preserve of New Mexico. Arturo Longoria

Arturo Longoria