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Erosion of intrusive body, then uplift -- but how much?

Intrusive body. Erosion of intrusive body, then uplift -- but how much?. Holocene and Pleistocene Sedimentation on the Antarctic Shelf Why study this topic? Holocene: period of dramatic S. Ocean changes w/o large CO 2 change.

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Erosion of intrusive body, then uplift -- but how much?

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  1. Intrusive body Erosion of intrusive body, then uplift -- but how much?

  2. Holocene and Pleistocene Sedimentation on the Antarctic Shelf • Why study this topic? • Holocene: period of dramatic S. Ocean changes w/o large CO2 change. • Pleistocene orbital cycles: 41K, 100K, CO2 chicken and egg, Ice/Ocean feedback. • Estimate volumes/profiles of the ice sheet – grounding lines….. • Pleistocene instabilities of west Antarctic ice, 400Kyr, 1100 Kyr • Ultra-high resolution records of climate change and Antarctic Margin productivity

  3. CO2variations2

  4. Holocene and Pleistocene Sedimentation on the Antarctic Shelf • Why study this topic? • Holocene: period of dramatic S. Ocean changes w/o large CO2 change. • Pleistocene orbital cycles: 41K, 100K, CO2 chicken and egg, Ice/Ocean feedback. • Estimate volumes/profiles of the ice sheet – grounding lines….. • Pleistocene instabilities of west Antarctic ice, 400Kyr, 1100 Kyr • Ultra-high resolution records of climate change and Antarctic Margin productivity

  5. CO2 from EPICA ice core analysis Siegenhalter, et al., Science 310, 1313-1317, 2005

  6. Brook (2005)

  7. Byrd Siple Taylor Dome Light Purple: Altitude > 3000m Red: Slope < 1/1000 Blue: Snow accumulation < 5g/cm2/year Green: Auroral oval below the horizon Gray: Limit of visibility for geostationary satellites.

  8. Holocene and Pleistocene Sedimentation on the Antarctic Shelf • Why study this topic? • Holocene: period of dramatic S. Ocean changes w/o large CO2 change. • Pleistocene orbital cycles: 41K, 100K, CO2 chicken and egg, Ice/Ocean feedback. • Estimate volumes/profiles of the ice sheet – studies of grounding lines and how the ice actually retreats….. • Pleistocene instabilities of west Antarctic ice, 400Kyr, 1100 Kyr • Ultra-high resolution records of climate change and Antarctic Margin productivity

  9. LGM in Lambert-Amery region

  10. Mount Ruker Loewe Massif Mount Lanyon Mawson Escarpment Mount Lanyon

  11. GSA Today – December, 2006

  12. Holocene and Pleistocene Sedimentation on the Antarctic Shelf • Why study this topic? • Holocene: period of dramatic S. Ocean changes w/o large CO2 change. • Pleistocene orbital cycles: 41K, 100K, CO2 chicken and egg, Ice/Ocean feedback. • Estimate volumes/profiles of the ice sheet – studies of grounding lines and how the ice actually retreats….. • Pleistocene instabilities of west Antarctic ice at 120 kyr, 400kyr, 1100 kyr • Ultra-high resolution records of climate change and Antarctic Margin productivity

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