This large mound of rocks possess a unique quality, unexplained by
science, and often seen more as a novelty or mystery than an oddity
of geology.
When struck with a hammer, these rocks produce a ring similar to
that of a bell. When asked why, no one seems to know - not even the
land managers who regularly answer this question.
One key to the mystery is that the rocks on the ground don't
chime when hit, meaning that the mound may have something to do
with the sound.
Another clue is that the rocks don't chime when they're removed
from the area. Which is ironic because it is illegal to remove any
of the rocks from this site.
The rocks here are igneous, meaning they were formed when molten
rock cooled, and have an iron component. They're about the size of
small cars, piled helter-skelter in a mound about 30 feet high.
Their surfaces are rough like a pumice stone, with their brown
color disrupted by off-white lichen.
There are two requirements to logging this earthcache:
1) Post a photgragh of yourself in front of the BLM sign.
2) Use your GPSr to track a route around the perimeter of the pile
and submit the answer to the owner's email. The correct answer must
fall within ten meters.