This front elevation of the Bourdois Shelter at Roc-aux-Sorciers shows the superimposition and alternance of natural deposits and human occupation layers from prehistoric times to the present.

© Geneviève Pinçon, d'après Suzanne de Saint-Mathurin 1984, habillage Aurélie Abgrall
Stratigraphic view of Roc-aux-Sorciers