SynopsisLiasicus Zone (middle Hettangian) ammonites, allocated to a new species, Franziceras sorleyi, are described from Hallaig, Isle of Raasay and indicate that the Breakish Formation / ^v (formerly lower Broadford Beds) there is older than previously thought. The new finds have / ^jIjT \ been integrated with the limited available biostratigraphic information from the rare records I tfT^ /fT% 1 of Hettangian and basal Sinemurian ammonites, and with local lithostratigraphy based I «^S K "H I on marker beds, to develop a new interpretation of correlations within the Skye-I l»sJ' ^J 8 I Raasay-Applecross area. This concludes that there was a diachronous early Jurassic \ ffl J transgression and facies change from the continental red beds of the Stornoway Formation ^s T^ ^s into the marginal marine carbonate-dominated sediments of the Breakish Formation.