That reminds me of a plane crash in south america that showed up at the bottom of a glacier many years later. I went searching for it, and found this instead:

http://www.alaskadispatch.com/article/20...-colony-glacier

Here's the one I was thinking of:

http://en.wikipedia.org/wiki/BSAA_Star_Dust_accident

Glaciers hold their secrets for many years, but eventually give them up.