Not exact matches
greenland was settled around 900 and had agricultural communities for about 400
years until
ice advanced.
As for an
ice age at the 65million
year extinction, don't forget that at that time there was no
ice anywhere on the planet, no
greenland ice sheet, no antarctic
ice sheet, no arctic sea
ice.
Yes, I have been to nsidc.org a fair amount, particularly this page to try to understand each Northern Hemisphere summer what is going on with
greenland ice melt: http://nsidc.org/
greenland-today/ While I do like that page, I must say I have not been able to find what I am looking for there, as far as clear non-scientist-oriented data that shows land
ice changes over the
years, whether for the Antarctic,
Greenland or other places.
For example, the GRIP
greenland ice cores show warming, starting 27,000
years ago.
You may be thinking of things like the Younger Dryas event ~ 8000
years ago, but this was not global it was only in the H, seen best in the
greenland ice cores.