While the land was rising, the river, armed...
While the land was rising, the river, armed...
Clip: 315424_1_1
Year Shot:
Audio: No
Video: Color
Tape Master:
Original Film: 821-16
HD: N/A
Location: N/A
Timecode: -
While the land was rising, the river, armed with such cutting tools as sand, silt and gravel, cut thru the rock layers of the canyon wall. At the same time other agents of erosion widened the canyon. These processes are still going on today.