Thee most convincing anecdotal evidence imho also is from Greenland. Years ago, some ice melted exposing an entrance to a mine shaft on a hillside, complete with ax picks. It was estimated to be 150 years old, as I remember, and buried in ice for that long..
Once warm, then cold, now warm again...and so it will go...
20 posted on 01/03/2017 8:34:50 AM PST by chiller
(One from the Right - One for the Fight)