Fig.3 Source cave in the edge of spoil salt heap
1-clay-and-salt spoil heap;2-deforme d clay-and-salt spoil rock;3-stockpile
bench;4-rockslide bench;5-underground stream and its hidden watercourse;6-examined part of
the underground channel;7-watercourse of a temporary stream;8-salted source with an
absorbing sinkhole;9-salted lakelet;10-karsthole over the underground stream watercourse;
11-comlex sink-and-swallow hole with relaxation cracks on the edges;12-corrosion
(infiltration) opening;13-slump hole;14-blocks of collapsed rock