Trou du Guillou 4
A Minervois cavity developed at the contact between Lochkovian black crinoidal limestones and Ordovician schists, with a descending passage at the interface of an iron ore horizon.
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Trou du Guillou 4
A Minervois cavity developed at the contact between Lochkovian black crinoidal limestones and Ordovician schists, with a descending passage at the interface of an iron ore horizon.
Citou
Length: 12 m · Depth: 4 m
Updated record
https://espeleoworld.com/en/c/trou-du-guillou-4-citou
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A Minervois cavity developed at the contact between Lochkovian black crinoidal limestones and Ordovician schists, with a descending passage at the interface of an iron ore horizon.
Description
Morphology
The entrance is fairly wide and immediately leads to a descending passage developed along the bedding at the interface between the platy limestones of the Lochkovian and an iron ore horizon of a characteristic orange color. A small side passage on the right appears to lead back toward the surface (air). The bottom is filled with sediments.
Other details
Geology: Minervois black crinoidal limestones of the Lochkovian (Devonian) at the contact with Ordovician schists. Iron ore along the contact.
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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/64828 · 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 Stoche (Géologie), Stoche · 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/64828 · data as of 2026