Detailed investigations of the Jurassic rocks of the Queen Charlotte Islands have necessitated a complete revision of the stratigraphic nomenclature. The Kunga, Maude and Yakounformations are elevated to group status. One new group name, the Moresby Group, is introduced for rocks of Late Bathonian to Early Callovian age. Eleven new formational names and ten new informal member names are proposed. The Jurassic rocks of the Queen Charlotte Islands are mainly elastic sediments indicating a variety of depositional environments and range from deep water euxinic shale to shallow marine coarse sandstone and conglomerate. Five major transgressive cycles are recorded. One rock group is essentially volcanic. The strata were deposited in a back-arc basin, as part of the Wrangellia allochthonous terrane. The faunas of the Jurassic strata are dominantly ofTethyan affinities. Both the macro- and microfaunas are diverse, wellpreserved, abundant, and show great promise for effective biostratigraphic zonation. The Sandilands and Ghost Creek formations are confirmed to be hydrocarbon source beds from which oil has migrated. Entrapment of these hydrocarbons is possible in the sandstones of the Moresby Group, or in the Cretaceous rocks beneath the Tertiary Masser volcanics. Indications are that some of the rocks are probably present beneath the Masser in northern Graham Island, southern Hecate Strait and Queen Charlotte Sound. Potential oil resources of these areas involve Mesozoic oil or escape oil of Mesozoic age into Tertiary rocks.