Late Triassic plant microfossils from Miers Bluff Formation of Livingston Island, South Shetland Islands, Antarctica

摘要: A moderately diverse assemblage of plant microfossils has been recovered from the Johnsons Dock Member Miers Bluff Formation, Livingston Island, including spores, pollen, acritarchs, wood fragments and cuticles. Containing a total c. 45 miospore taxa, palynoflora is dominated by non-striate bisaccate but spores pteridophytes pollen gymnosperms are proportionate in diversity. The similar composition to those indicative subzones C+D Alisporites Zone Antarctica, upper Craterisporites rotundus lower Polycingulatisporites crenulatus Australia as well Foveosporites moretonensis New Zealand, suggesting Late Triassic (possibly Norian-Rhaetian) age. This determination supported sporadic occurrence Aratrisporites Classopollis absence striate grains.