Rock laboratory

Where is the rock laboratory located?

The Mont Terri rock laboratory is situated to the north of St-Ursanne in the canton of Jura, around 300 m underground. It is accessed via the safety gallery of the Mont Terri motorway tunnel.

Interior view

The rock laboratory comprises 1200 m of galleries and niches. The horse-shoe shaped galleries are 4 to 5 m high and well-lit.

Operation of the rock laboratory

swisstopo (which includes Swiss Geological Survey) is responsible for the independent, smooth, and safe operation of the rock laboratory. The site belongs to the canton of Jura.