Autochthony and orientation patterns in Olduvai Bed I: a re-examination of the status of post-depositional biasing of archaeological assemblages from FLK North (FLKN)

► Orientation patterns at FLK North (Olduvai Gorge, Bed I) assemblages are isotropic. ► This contrasts with reported anisotropy reported from Leakey's drawings. ► It is shown that the Bed I sites are taphonomically authochthonous.