詹姆斯羅斯島
The Snow Hill Island Formation is a Late Campanian geologic formation found on James Ross Island, James Ross Island group, Antarctica. Remains of a paravian theropod "Imperobator antarcticus" have been recovered from it, as well as the elasmarian ornithopods "Trinisaura santamartaensis" and "Morrosaurus antarcticus", the nodosaurid "Antarctopelta oliveroi", and the shark "Notidanodon" sp. Alongside these described genera are also the remains of indeterminate elasmosaurids, lithostrotian titanosaurs and an indeterminate pterosaur.