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    Unstable Rock Zones

    Class Prerequisites:

    4 Hours

    Equipment Needed:
    Cave Pack, with standard caving gear.

    This class teaches cavers how deal with with unstable rock zones (URZs) within caves. Students will learn about the forces that create a URZ, and its composition and construction. They will learn about the mechanics of failure for breakdown piles, contact zones, keystones, slabs, fractures, and cantilevers. Cavers will learn about the hazards found in entrances, pits, large rooms, and on walls and floors. They will learn how to evaluate each type of zone for safety, and how to mitigate each area. Most importantly, they will learn how to deal with basic problems of entrapment, and rescuer access.


Pages created June 1998 - Last update November 1998
Copyright ©1998 Cindy Heazlit for The Self Rescue Group
Designed and maintained by Cindy Heazlit