Constantly Moving Earth

The Grabens is an area in the Needles District of Canyonlands National Park along the Colorado River that is constantly changing. The earth in these grabens is slowly moving up and down along faults and has resulted in a series of upthrown and downthrown blocks that results in long valleys between high areas. We talk with geophysicist Alba Rodriguez Padilla about the movement along these faults and how the information helps understand earth movements elsewhere.