Neogene Biostratigraphy of the Pagadroma Group

The Miocene Fisher Bench Formation exceeds 350 m in thickness at Fisher Massif, where the yet older Miocene (or Oligocene) Mount Johnston Formation overlies basement rocks at up to 1400 m above sea level. Individual formations contain either Miocene diatoms, or else Pliocene-early Pleistocene diatom foram assemblages. The diamicts are interpreted as fjordal ice-proximal or ice-contact sediments, deposited seawards of tidewater glacier fronts located some 250 to 300 km inland of the present ocean margin.

Each formation records an ice recession following a glacial expansion. This work was also completed for ASAC project 2086 (ASAC_2086). Some explanatory notes for the excel files are: BARDIN = Bardin Bluffs GLOSS. = Glossopteris Gully BAIN= Bainmedart Cove PCM = Prince Charles Mountains AM = Amery (as in Amery Oasis) Sample numbers are from different positions within exposed sequences (illustrated in figures in the paper).

Top and Bottom represent the 'top' and 'bottom' position in some sequences. These are also illustrated in the figures. Positions are illustrated in the manuscript Whitehead, et al (2004).

Dm = diamict sample, Mud = Mud. Raw slides = standard strewn microscope slides Concentrated slides = heavy liquid separation to concentrate the fossils The fields in this dataset are: Location Name Number Lithology Bardin Bluffs Battye Glacier Fisher Bench Mt Johnston Length (micrometres) Width (micrometres)