It is a large calcareous olistolith that was described by van de Graaff (1971b) and contains small colonies of auloporid corals in growth position.
These localities correspond to Visean olistoliths in Serpukhovian olistostromes.
The only other known Ordovician species of the genus is Diencobolus naukatensis (Holmer, Popov & Bassett, 2000) from the Lower Ordovician (presumably Floian) olistolith
in the Silurian Pulgon Formation of the Alai Range in southern Kyrgyzstan.
10) including calciturbidites and olistostromes (mega debris flows) containing olistoliths
(clasts) as large as automobiles.
As regards the Upper Ordovician exposed in southern Normandy, based on conodonts and other fossils, the Vaux Limestone as well as limestone olistoliths
in the overlying 'Tillite de Feugueroles' ('Pelites a fragments') were dated as Ashgillian (Weyant et al.