The discovery and first exploration was carried out by J. Montoriol and F. Vicens, of the GES-CMB, on 26 January 1949.

As it is a very little-known cavity, on 10 January 1960 members of the GIE of the CE de Gràcia explored it thinking that it was an unpublished cavity and renamed it Avenc de la Viola. Even Eugeni Marigot was inspired by this pit to make a curious (highly idealized) plaster model that is currently in the Museu de l'Espeleologia Catalana - Centre de Documentació at the headquarters of the Federació Catalana d'Espeleologia.

We have always thought that there was an error on the part of the first explorers when transcribing the record of this cavity and that of the avenc del Marianet and that the names of one were swapped for the other. Possibly, the Marianet was the shepherd who indicated the cavity to them and, on the other hand, the one catalogued with his name has a smooth rock, like a slab, at its entrance.

We update the record (March 2016) including the original survey made by the members of the GIE in 1960 and a photograph of the model made by Eugeni Marigot.

At the end of March 2017, during a visit by members of the ERE – CEC, they find the name Avenc de Marianet painted at the entrance. It seems that the “painter of Garraf” has taken up our hypothesis about the name change when the two cavities were published and has decided to go ahead. The fact is that this hypothesis will hardly be verifiable and therefore we think it will be better to leave the names as they have always been. For the moment (April 2017), the Avenc del Marianet has not been the object of any graffiti at its entrance.