(in French)Fontaine de Saint-Moré, with varied photos of the place and of the Merovingian sarcophagus quarry located among the Saint-Moré caves. See the geoportail map for the location of the caves.
The scale (1/17000) of the Geoportail maps (1/17000) can be modified by zooming in or out. Aerial photography and geology maps available in the Catalogue de données panel tab on the left hand-side of the map (Aerial photography layer is in Catalogue de données tab, Données de base sub-menu, Photographies aériennes 9th entry down; geology map layer: Catalogue de données tab, Données de base sub-menu, Carte géologique 3rd entry down). Many other different layers can be added via the catalogue de données menu.
(in French) Jean-Claude Liger, op. cit., page 445 (shows a map drawing of the Horse cave, made from an assay by A. Hesse in 1961).
(in French) Jean-Claude Liger. Concrétionnement et archéologie aux grottes d'Arcy-sur-Cure (Yonne). (Concretionation and archaeology in the caves of Arcy-sur-Cure) Bulletin de la Société préhistorique française, 1995, Vol. 92, no. 4, pp. 445-450. Page 448. The article is a study of the way lime accretions develop in these caves.
petit-patrimoine.com
(in French)Les grottes de Saint Moré à Saint-Moré (89) on petitpatrimoine.com. Summary of these caves, with a few good photos including the aiguillette de Saint Moré, a notable geology feature.