Peer into a hidden abyss at Colorado's least-visited national park
Peer into a hidden abyss at Colorado’s least-visited national park Sarah Keller © Photograph by Keith Ladzinski, National Geographic The Black Canyon’s dark metamorphic rocks—inlaid with bands of pink granite—are nearly two billion years old. Although Precambrian rocks like these are typically buried deep, two million years ago the Gunnison River began baring the “basement” rock at a rate of one inch every 100 years. The Black Canyon of the Gunnison is alluring, but don’t expect mules, jeeps, or even trails to help you reach the depths of Colorado’s least-vis...
Source: msn.com