Arreba

The mouth of the pit is found in a large fissure with an EW direction, a consequence of it tearing towards the valley. It is an EW-trending fissure with an NS turn of about seven metres, where the greatest vertical is seen. Entering it, one observes a large, totally vertical rupture 60 mts deep, with dimensions of 1.5 mts constant until its end in an NS direction, and from 6 to 12 mts in an EW direction. The walls are very smooth, with clay sediments in the first forty metres of descent and totally clean in the last twenty metres. The vertical ends in a debris cone made up of small blocks of 10x10 cm on the East side, which contrasts greatly with others created by the collapse of the vault, formed of blocks of 100x120 cm. In the first cone referred to above there is a continuation of the fissure. Pit 50 m deep.