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Author Topic: WAIS during Oligocene  (Read 1487 times)

Pmt111500

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WAIS during Oligocene
« on: October 11, 2013, 06:55:24 AM »
Some relatively recent news items.
http://phys.org/news/2013-09-west-antarctica-ice-sheet-million.html#inlRlv
http://phys.org/news/2013-10-west-antarctic-ice-sheet-earlier.html

I'd assume it has always been a possibility that during hothouse conditions in Paleocene-Eocene the  West Antarctic was a low plain for the lack of ice induced subsidence. Afterwards during the growth of the ice sheets the crust would have eroded and got down for the weight of ice leaving us today with a ice sheets grounded on ocean. So this isn't probably telling anything about the stability of the WAIS, rather only showing that there's much potential for rebound - so possibly WAIS won't come off continuously when or if it starts...

OT question:
The Bedmap shows (at least to my eye) some higher ground under the marginal sheets on locations. Is there a way to determine the age of these? Are these a result of Pleistocene glaciation cycles or have they formed earlier?
Amateur observations of Sea Ice since 2003.