In geology, Chellian was the name given by the French anthropologist G. de Mortillet to the first epoch of the Quaternary period when the earliest human remains were discovered. The word is derived from the French town Chelles in the department of Seine-et-Marne. The climate of the Chellian epoch was warm and humid as evidenced by the wild growth of fig trees and laurels. The animals characteristic of the epoch are the Elephas antiquus, the Rhinoceros, the cave bear, the hippopotamus and the striped hyaena. Man existed and belonged to the Neanderthal type. The implements characteristic of the period are hand-held flints chipped into leaf-shaped forms.. The drift-beds of St Acheul (Amiens), of Menchecourt (Abbeville), of Hoxne (Suffolk), and the detrital laterite of Madras are considered by de Mortillet to be synchronous with the Chellian beds.