Stratigraphy and facies

The rock laboratory is situated in the Opalinus Clay rock formation, a marly argillaceous claystone with different proportions of sand and carbonates.

3D geological model

This short movie presents the new geological 3D-model of the Mont Terri area. Data from the lab (boreholes, mappings) are combined with regional geological data (maps, cross-sections, etc.).

Geological structures

The main tectonic element in the investigation area is the Mont Terri anticline. It is the northernmost anticline of the folded Jura.

Properties and characteristic values

Opalinus Clay exhibits properties conducive to the deep geological storage of radioactive waste. The advantages clearly outweigh any disadvantages.