Avenc Montserrat Ubach

The cave has two entrances connected by a ramp; the upper one hangs on the wall 10 metres above the lower one, the latter being the usual access. The 3x2.5 metre entrance gives access to a ramp, at the end of which a 27.5 metre shaft opens; at the same time, a 9 metre handline begins that skirts the shaft (Via ECG), followed by a 6 metre-long crawl that leads to a small chamber and immediately afterwards we find a 34.5 metre shaft; 4 metres down it, we find a small ledge formed by a large wedged block; here an 8.5 metre shaft begins, followed by two drops until reaching a small chamber where it becomes impassable. If we continue down the main shaft we will find a ledge at 25 metres; the base is wide and elongated and on the O side we can descend 3.5 metres without a rope, finding a narrow joint with clay, guano and unstable walls; after a succession of narrow passages we reach a large ascending shaft, its base being six metres below at -80 metres; before descending it, however, behind us we find a narrow passage through which 6.5 metres can be descended, this route ending at -83 metres.

Back at the entrance ramp, we will descend the 27.4 metre shaft of circular section; the ramp base places us on an upper false floor, at the end of which a new 27.7 metre vertical opens; in this shaft, if we ignored the false floor and descended from its beginning, we would find two ledges situated at -6 and -13 metres (Pou dels Replans). At one end of the base and within a marly stratum the third shaft of 22 metres opens (Pou de la Xineta), which is also connected by its upper part with the base of the second, by means of a narrow conduit. At the bottom of this third shaft three branches emerge, one of which, very narrow, leads to a small lateral spindle, while on the opposite side another small inclined gallery opens laterally into a wide shaft 12 metres above the base of the fourth shaft. This same point can also be reached by ascending 4 metres from the base of the third shaft, until reaching a large window that gives access to a vertical in which at 7 metres a large gour develops and after a narrowing descends to the base of the fourth shaft. Just on the ground a crawl opens which after 5 metres leads into a 3 metre vertical, where a sling is needed; at the base we find a wide gallery at the end of which we find a dome 13 metres high and the floor full of large blocks; among them the entrance of the fifth shaft of 22 metres opens, which has a ledge at -8 metres (depending on where it is rigged, one descends directly). Once at the base, it widens towards the N, where we find the entrance of the sixth shaft of 23 metres with a ledge at -14 metres. At the bottom of this shaft, a steep ramp and several drops begin, starting the seventh shaft. This is reached laterally and in mid-air; the bottom forms a narrow gallery totally occupied by clay, ending in a last small 2 metre shaft. This point can also be reached by a window situated 4 metres above the base of a lateral spindle of the ramp before the shaft; the descent on this side presents an inclination of 80º until reaching a clayey ramp that places us at the same final point indicated above. The total depth is 202 metres (-198.5/+3.5).