The (free) Museum of Geology at the Colorado School of Mines in Golden has some very interesting rock samples that came from North Table Mesa. When I saw this pile of rocks, I wondered where all the pretty ones at the museum came from--they looked nothing like these gray, weathered, lichen-covered rocks. Maybe next time I'll bring a hammer...
You're looking for a 6" camouflaged pill bottle. Don't put your hands into holes without looking carefully first--this is rattlesnake country.
Local History Trivia: A week after I placed this cache, I met Harald Drewes, a retired geologist who wrote a booklet about North and South Table Mesas. He told me that these two mesas were built up by four separate lava flows--very long ago, when north and south table mesas were not separated by the eroded valley in which Coors Brewery sits today. Harald explained that the pretty minerals I saw in the geology museum at the School of Mines were formed when lava pushed up through wet rock, which caused the land to bulge, and minerals to separate.