Note: this is an old thread, the ice bridge cave-in occurred June, 2011.Marcia's mis-adventure is now described in Backpacker Magazine -- March 2013:
Out Alive: Trapped in an Ice Tunnel <-(
click for the article)
A solo hiker tries to claw her way out of a frozen cave after a winter pathway collapses.
by: Joshua Prestin
On the third page of the article, there is a video taken from her ice-cave shelf that one of her rescuers was able to record.
