Avenc de Joan Grao

Pit located in a stepped fracture. The mouth is 1X1 metre. 2 metres of inclined passage are descended until reaching the head of a shaft 4 metres deep, and a width of 0.60X1.50 metres. At the base of the shaft, if we look in direction NE we find an entrance 0.80 metres high and 0.60 metres wide that leads to a small descending passage of 1.30 metres. Above this entrance there is a small window of 0.50X0.50 metres that communicates with the ceiling of the aforementioned passage. If we look in direction NO, there is an insignificant attached shaft 0.50 metres deep and 0.70 metres in diameter. At this point the maximum depth of the pit occurs: -6 metres.