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Victoria University Antarctic Research Expedition Science and Logistics Reports 1976-77: VUWAE 21

D. Fry Glacier region

D. Fry Glacier region

  1. The previously geologically unmapped area of approximately 1500 sq.km was completely mapped. This area extends from the Convoy Range in the west to the Kirkwood Range and lower Fry Glacier in the east, and from Trinity Nunatak in the north to Benson Glacier and Mt. Razorback in the south.
  2. Beacon Supergroup sediments were studied in detail at at least 14 sites. Most of the sediments which were exposed were mainly the Arena Sandstone and Beacon Heights Orthoquartzite of the Devonian Taylor Group.
  3. The Aztec Siltstone, the topmost formation of the Taylor Group, was missing. It appears to have been eroded off by ice in the Permian - Carboniferous. The Metschel tillite was deposited on this surface, but as the climate improved much of the tillite was removed and a coal-bearing sequence, the Weller Coal Measures, was deposited.
  4. The sandstone forms large rafts "floating" in Ferrar dolerite. This was emplaced as sheets in the Jurassic and now forms the most common rock type in the area.