The Charmouth Mudstone Formation is a geological formation in England, dating to the Early Jurassic. It forms part of the lower Lias Group. It is most prominently exposed at its type locality in cliff

Xiphodracon is an extinct genus of leptonectid ichthyosaurian known from the Early Jurassic Charmouth Mudstone Formation of the United Kingdom. The genus contains a single species, Xiphodracon goldenc