Avenc de Sant Jaume de la Mata

The entrance is funnel-shaped; on one side it has a ramp by which we can descend to a not very wide opening, easy to enter but very uncomfortable on the way out. From here a sloping shaft of 26 metres follows, which we will descend always brushing against the wall and where, a few metres above its bottom, we will find a ledge formed by a large wedged block; we will continue down until reaching a cone of debris; on one side we can follow a short crawl that ends in a small chamber; in the opposite direction a steep ramp continues that ends vertically and leaves us at the beginning of a descending gallery that we will follow until it opens out into a chamber about 3 metres high, 8 long and some 5 wide. From the N side of this chamber, after having carried out a clearance, one reaches a crawl and a shaft of a couple of metres that place us in a descending gallery that goes down to -52 metres. In the roof of the gallery we find an ascending duct that ends in a short gallery.