A
hoodoo (also called a
tent rock,
fairy chimney, and
earth pyramid) is a tall, thin spire of
rock that protrudes from the bottom of an
arid drainage basin or
badland. Hoodoos, which may range from , typically consist of relatively soft rock topped by harder, less easily eroded stone that protects each column from the elements. They generally form within
sedimentary rock and volcanic rock formations.