Copyright Information: All images are in the public domain and available for free. If you use this image, credit NOAA/NGDC, B. Bradley, University of Colorado. |
Creep in Haymond Formation (sandstone and shale) near Marathon, Texas. The apparent bending of sandstone beds is actually produced when beds fracture into small vertical sections. These sections are then moved down slope at differing rates depending on depth from the surface. The blocks closest to the surface are displaced downslope to the greatest extent. Image Credit: B. Bradley. University of Colorado The slopes above streams and rivers are subjected to a variety of processes that cause them to recede and retreat from the river or stream channel. These processes, collectively called mass wasting, can be classified according to rapidity of movement and according to the type of materials that are transported. |
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