The Nans-les-Pins hills comprise two structural units. The autochthonous unit corresponds to the Pins plateau and is composed of upper Jurassic and lower Cretaceous formations. The allochthonous unit--the Jurassic outlier south of Nans-is thrust over the autochthonous unit. The development of the structures began in the Cretaceous with folding along east-west axes, followed by shearing, overthrusting, and reactivation of northwest-southeast-trending structural components in the Eocene and Oligocene. The main thrusting phase was probably initiated in the Pontian (Miocene).