We can differentiate on the one hand the mine and on the other the chasm, which do not connect but it seems that the mine was built to be able to access the sinking of the chasm and had to be abandoned due to the lack of possibilities that this cavity presented . The mine begins with a very narrow trench (0.7 m wide) that leads us to a small natural cavity with a certain concretion.
At the NW end of the mine there is a small natural vertical hole, with parietal concretion and that opens to the outside. The chasm is formed by an irregularly shaped depression that widens towards the bottom. This chasm has a depth of 5.5 m. It has an elongated upper opening which is seen to have been touched up by the hand of man but which must have existed before, as it is covered with cast in the upper part of the SE wall.
You can also see a small hole at the SW end, on the wall of which silts with horizontal stratification and remains of Tudorella ferruginea are exposed. Spiders of the species Meta bourneti are also seen in this room
THE CAVITIES OF THE SERRA DE NA BURGUESA. ZONE 6:
MINING IN THE SERRA D’EN MARILL (Palma, Mallorca)
by Pere BOVER, Antelm GINARD, Damià CRESPÍ, Damià VICENS,
Mateu VADELL, Jaume SERRA, Gabriel SANTANDREU and Miquel Àngel BARCELÓ