 The site is particularly rich in rhinoceros.From 1854, Duvernoy has even described a specimen as "Acerotherium gannatense" (the official name is "Diaceratherium lemanense").The most complete rhinoceros skeleton was discovered in 1993 when significant fossils were uncovered at the Sichaux quarry by paleontologist François Escuillié (notable discoverer of a small proboscidian mammal, ancestor of the elephant from 50 million years ago).