Major middle Miocene global climate change: Evidence from East Antarctica and the Transantarctic Mountains

  title={Major middle Miocene global climate change: Evidence from East Antarctica and the Transantarctic Mountains},
  author={Adam R. Lewis and David R. Marchant and Allan Charles Ashworth and Sidney R. Hemming and Malka L. Machlus},
  journal={Geological Society of America Bulletin},
We present a glacial record from the western Olympus Range, East Antarctica, that documents a permanent shift in the thermal regime of local glaciers, from wet- to coldbased regimes, more than 13.94 m.y. ago. This glacial record provides the fi rst terrestrial evidence linking middle Miocene global climate cooling to a permanent reorganization of the Antarctic cryosphere and to subsequent growth of the polar East Antarctic Ice Sheet. The composite stratigraphic record constructed from fi eld… 

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