Copyright Information: All images are in the public domain and available for free. If you use this image, credit NOAA/NGDC, D. Krammer, Disaster Services Boundary County Idaho. |
On October 15, 1998, more than 200,000 years of mud gushed out of North Hill. It covered up a county road, and destroyed a portion of Union Pacific track and a 200 yard area of Highway 95. The mass of mud buried almost one million dollars worth of equipment. Note the rails still suspended in air after the collapse of material beneath them. Highway 95, Idaho's only major north-south route, was closed three weeks because of the slide. Image Credit: D. Krammer. Disaster Services Boundary County Idaho 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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