A single copper yoke from the back of a TV can be worth an hour's wages in Asia . Some. Foreign Importers accept the whole unit, break o ff the copper, and throw the leaded glass. CRT in the river. Rudimentary, artisa n  gol d recyclers soak circuit boards in acid, and. pan for gold at the river's edge.
Landscape[edit] The Black Canyon (contained in the borders of the park) is a very deep gorge containing sheer cliffs up to heights of 2250 feet (685 m). The canyon was carved by the Gunnison River, located at the very bottom of the canyon.
When John Wesley Powell led an expedition down the Colorado River and through the Grand Canyon in 1869, he was confronted with a daunting landscape. At its highest point, the serpentine gorge plunged 1,829 meters (6,000 feet) from rim to river bottom, making it one of the deepest canyons in the United States.