Below, browse photos of Black Canyon of the Gunnison National Park (near Montrose, Colorado, USA), captured by Tom Dempsey. See fanciful patterns of pegmatite intrusions on the spectacular Painted Wall, in Black Canyon of the Gunnison River. This steep torrent of water has cut a gorge 2300 feet deep at Painted Wall View. Pressurized molten rock was forced into 1.7-billion-year-old metamorphic rock, forming pink pegmatite stripes on Colorado's highest cliffs. With two million years to work, the Gunnison River and weathering have sculpted a vertical wilderness of rock, water, and sky. Stay in the campground to capture orange sunset and sunrise.