Aven de l’Aspirateur

aven de l'aspirateur

ASPIRATEUR • 30630 Montclus • AVCFC

aven de l'aspirateur

Discovered in 2003 by Jean-Claude Girard and Jean-Louis Souchon (member of the GNES), it is located in the plate of Méjannes-the-Clapperboard, is surrounded by Cèze, and was the object of a protection by local by-law of the town hall of Montclus which in is owner.

The entry, tiny was penetrated in 2006, after many meetings of release by a series of wells staged to the coast – 92.

One observes on his walls the indisputable traces of phreatic circulations then paragenetic, in direct connection with the crisis messinienne of salinity (draining of the Mediterranean, then marine invasions with blocking of the karst).

One can precisely go back initial training to this cavity to 8 million years, and his mode of paragenetic circulation from approximately 5 to 6 million years.

Of these episodes, the cave preserves surprising traces, in the forms of pots of ceiling, feast-limits in walls, dryings of argillaceous fillings, but also of parietal networks evoking of the roots which are only ways of bubbles of degasification (carbonic gas) which can have been in connection with hydrothermal increase.

aven de l'aspirateur
Arborescences

A perched sector of the cavity delivers very beautiful calcite concretions; elsewhere, one probably admires superb “rods of gours” of bacterial origin and which seem largest of Europe.

Rarest in this swallow-hole is the existence of gours filled up triangles, and especially of solid masses stalagmitic entirely made up of a “calcite paste with encased triangles”, which seems single.