ER-7

A small-mouthed sinkhole that continues into a 20 m long crawl of cones, narrow and low-ceilinged. After the pool there is a chamber 2 m high by 1 m long by 3 m wide. Then one enters a crawl of larger dimensions, 1 m high by 0.5 m wide, which gradually becomes higher until one can stand up.

Roots can be seen hanging from the ceiling of the crawl.

The crawl ends in a pool into which one must immerse fully to continue. In the chamber the floor is dry, but the stream bed can be made out in the rock. Downstream, the water seeps among some gravel; in the opposite direction another trickle of water comes in and seeps through the same spot. Three inflows from the sinkhole above can be seen in the ceiling of the crawl.

One continues along the crawl of cones to the pool, where one must immerse fully to continue; then one crosses the dry chamber and follows the stream bed into a wider crawl, which gains height until it allows one to stand up, and one continues downstream.