Cova-avenc de l'Estorac

Access is via a doline that originally appeared as an asymmetric trench 2 metres wide and 5 metres long, oriented WNW-ESE, with a clear structural influence. At the eastern end a gentle slope leads to the – 3.5 level where a narrow opening at ground level gives way to the subterranean part. The connecting crawl, after about 5 metres of dragging, leads to a small chamber 12 x 5 metres with a maximum height of 10 metres, which represents, volumetrically, the largest chamber of the cavity, being subdivided by an intermediate step of 2 metres, beneath which a lower floor develops. At the deepest point of the small chamber (- 11), a small hole in the floor (its passage being quite selective), descends 3.5 metres in an irregular manner and with wedged blocks that hinder passage. At its bottom a gallery of progressively greater width from 1 to 2 metres develops, of meandering appearance and a length of approximately some 20 metres. Just on the eastern wall of the gallery, at floor level, another very narrow hole opens, leading to a small slope and above a step from where a small chamber 4 x 2 metres is overlooked, covered by a large quantity of blocks with evident signs of water action. Among them, in a NW direction, a pit of 12 metres opens, divided into two coalescent and connected units. The bottom of the pit (8 x 2 metres) is occupied by a considerable uncemented clastic accumulation, which allows one to squeeze between them to reach 40 metres of depth, the point of maximum penetration.

This sector of the cavity is the most beautiful due to the large quantity of stalactitic formations.

At the bottom of the pit, at 40 metres of depth, the point of maximum penetration, the clayey impermeabilisation allows the accumulation of water, of very variable level.

Access is via a doline. At the eastern end a gentle slope leads to the – 3.5 level where a narrow opening at ground level gives way to the subterranean part. The connecting crawl, after about 5 metres of dragging, leads to a small chamber. At the deepest point of the small chamber (- 11), a small hole in the floor descends 3.5 metres. At its bottom a gallery develops. Just on the eastern wall of the gallery, at floor level, another very narrow hole opens, leading to a small slope and above a step. Among them, in a NW direction, a pit of 12 metres opens. The bottom of the pit is occupied by an uncemented clastic accumulation, which allows one to squeeze between them to reach 40 metres of depth.