Near La Carriere village existed outcrops of hard, coarse sandstones, Guppy (1867) was the first to call the interval Point-a-Pierre beds. Waring (1926) used the term Point-Pierre Formation for these outcrops at Simpsons Point on the Point-a-Pierre coast. Based on arenaceous foraminifera recovered in Point-a-Pierre the age appears to be Lower Eocene, however, there has been no foraminifera recovery at any other outcrop locality.  Algar et. al. (1998 & 2012) performed zircon fission track dating and proposed a 34.4 Ma Lower Oligocene age.  These ages have not been replicated by any subsequent workers.