The following is a geomorphological and speleological map of the Sornin glacio-karstic basin, showing part of the underlying Gouffre Berger system. It was produced by Stéphane Jaillet and Gilbert Bohec, and is reproduced with their kind permission. It was originally published in Spéléo magazine (no.132). See here for a Deep-Zoom survey of the Gouffre Berger.
