When you light this rock it burns like wood*
140 x 140 cm
* Quote from the Arab geographer and naturalist Al-Dimashqi (1256 - 1327).
— Rock 1555, Pecopteris fossil (tree fern) on oil shale, Permian period (298.9 - 251.9 million years), Autun Natural History Museum Collection.
— Corner of panel with moulded frame, fragment of oil shale bas-relief from a Roman public monument in Augustodunum, 2nd - 3rd century, Rolin Museum Collection.
— Cooked shale, oil shale after extraction of shale oil by pyrogenic method, Igornay deposit (1839-1899), Autun Natural History Museum Collection.