Banquier Cave survey projected on the geological cross-section with colours referring to the galleries visible inset: orange corresponds to the Western gallery, blue is the Eastern gallery, green is the Northern gallery and pink is the Southern gallery. The Banquier Cave develops primarily in the Hettangian and Sinemurian carbonates. The Eastern and Western galleries are situated below the Lower Entrance height and develop parallel to Hettangian dolomite. These galleries present morphologies characteristic of the epiphreatic zone.