Aven Marc
A cavity whose entrance, 0.5 m by 0.5 m, opens at ground level, with several small steps, constrictions and Un small parallel network.
EspeleoWorld
Aven Marc
A cavity whose entrance, 0.5 m by 0.5 m, opens at ground level, with several small steps, constrictions and Un small parallel network.
Cournonterral
Depth: 10 m
Updated record
https://espeleoworld.com/en/c/aven-marc-cournonterral
Information can change. Always verify coordinates, access, weather, and cave conditions before setting out.
A cavity whose entrance, 0.5 m by 0.5 m, opens at ground level, with several small steps, constrictions and Un small parallel network.
Description
Morphology
The entrance (0.5 m x 0.5 m) opens at ground level in the earth. The bottom of the cavity consists of A narrow joint. At mid-height there is Un large ledge where A cleared constriction leads to Un small parallel network ending at another constriction (not passed). The bottom of the cavity is choked by the various collapses produced during the opening.
The dip of the strata (35 to 40 degrees) is the same as for all the cavities in the sector located on the same slope of Costebelle.
Progression
Un small step leads to Un ledge where there is A cleared constriction (1 shot). Another series of small steps leads to the bottom of the cavity.
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Contains information from Grottocenter (Wikicaves), grottocenter.org, made available under the Open Database License (ODbL 1.0, https://opendatacommons.org/licenses/odbl/1-0/), modified. · https://grottocenter.org/ui/entrances/74699 · The derived data is available on request under the ODbL: [email protected] · data as of 2026 · Source: Grottocenter (Association Wikicaves), worldwide collaborative cave database (grottocenter.org), modified. CC BY-SA 3.0, https://creativecommons.org/licenses/by-sa/3.0/ Grottocenter (Wikicaves) · Text by Marc Jupin (Description générale) · adapted by Espeleoworld (normalized, translated); the adaptation is licensed CC BY-SA 3.0, https://creativecommons.org/licenses/by-sa/3.0/ · https://grottocenter.org/ui/entrances/74699 · data as of 2026