Glacial erratics on King George Island (South Shetland Islands) thought to derive from Argentina Range.

Abstract of ref. 1504:
Twenty six species of archaeocyaths are described (seven in open nomenclature), including Naimarkcyathus elenae gen. et sp. n. representing a new family Naimarkcyathidae and superfamily Naimarkcyathoidea of the order Archaeocyathida, from the Cambrian limestone erratics in the glacio-marine sediments of the Oligocene Polonez Cove and Early Miocene Cape Melville Formations on King George Island (South Shetland Islands, West Antarctica). They are accompanied by coralomorphs and calcified cyanobacteria. The archaeocyathan assemblage closely resembles allochthonous assemblages from the Weddell Sea and Whichaway Nunataks. Current reconstructions of icestream movement and iceberg drift, and similarities in species composition, suggest the Argentina Range limestones as a source of these erratics. The species Stapicyathus stapipora, Prethmophyllum subacutum, Aporosocyathus mucroporus, 'Mennericyathus' dissitus, Paranacyathus sarmaticus and Archaeopharetra irregularis are added to the list of common species for Antarctica and Australia. The total list of the common Australian-Antarctic archaeocyaths now include 31 of all of the 52 well defined Antarctic species. The archaeocyaths of King George Island, and Early Cambrian Antarctic archaeocyath assemblages (except these of the Mt. Egerton in the Byrd Glacier area) are of uppermost Botomian age (Syringocnema favus Beds) as in South Australia. This means that archaeocyaths did not reach Antarctica until latest Botomian time. Erratic blocks containing archaeocyaths represent various reef facies similar to the Shackleton Limestone facies and those of South Australia. The occurrence of small shelly fossils (Dailyatia ajax, ? Byronia sp., Halkieria parva, Thambetolepis delicata and Albrunicola bengtsoni) which are typical of the Parara Limestone, of the Syringocnema favus archaeocyathan assemblage, and of Hadimopanella antarctica and certain brachiopods in erratics of different lithologies, suggests a very similar faunal and facies succession for Antarctica and South Australia and therefore, a comparable basin history. 