The stratigraphy of a Late Palaeozoicudborehole section at Douglas River, eastern Tasmania: a synthesis of marineudmacro-invertebrate and palynological data

摘要

A section 236.8 m in thickness of Late Palaeozoic (Late Carboniferous-Permian) rocksudof the Lower Parmeener Super-Group was encountered in a borehole at Douglas River, easternudTasmania. Lithological, marine macro-invertebrate and palynological data are documentedudand collated. The section displays many similarities with sequences elsewhere in easternudand northeastern Tasmania, but is unusual in the development of rocks (includingudTasmanites shale) as old as Early Tamarian. This occurrence may indicate a narrow, butudsignificant east-west breaching of the land barrier which persisted throughout theudTamarian over most of eastern and northeastern Tasmania. Acritarch swarms coeval withudsedimentation occur at intervals, whereas other acritarchs may be derived from earlierudPalaeozoic rocks. The Tasmanian Late Permian palynofloras lack diversity and resembleudthose from the Transantarctic Mountains, Antarctica, rather than those from elsewhere inudeastern Australia.