First find of the Upper Tithonian ammonite genus Blanfordiceras from the Miers Bluff Formation, Livingston Island, South Shetland Islands
The first find of a macrofossil, the age-diagnostic Upper Tithonian ammonite Blanfordiceras sp. (aff. wallichi) is reported from the Miers Bluff Formation (MBF). The presence of this genus is indicative of the Antarctica-specific Blanfordiceras ammonite zone from the middle Upper Tithonian. This zone is an approximate time equivalent of the Mediterranean Paraulacosphinctes transitorius zone. The new Late Tithonian age of the MBF (Hurd Peninsula, Livingston Island) allows to suggest that the MBF is partly synchronous with the Anchorage Formation (Byers Peninsula, Livingston Island), the Nordenskjöld and the Latady Formations (Antarctic Peninsula), and thus plays an important role for the Upper Jurassic to Cretaceous depositional history and structural evolution of the South Shetland Islands and of the Antarctic Peninsula.