The sea passed by here
Among the few extraction sites still accessible on the Aquitaine side of the Poitou threshold, the Ricou quarry is the only one that allows the Hettangian Sinemuro (lower Lias) and the Pliensbachian (middle Lias) to be studied in good conditions.
This specificity motivated the inclusion of the site in the regional inventory of sites of geological and geomorphological interest carried out by the National Natural Reserve of Toarcian for the Regional Conservatory of Natural Spaces Poitou-Charentes.
This exceptional geological spot has been a privileged place for geology teachers and their students for many years.