Geoscience Challenge, October 2013–by Dr. C

A river of ice, mountains on either side

Moved from Dr. C’s facebook page: 

Oct 2012 Geoscience Challenge:
Where was this pcture taken?
What caused the squiggly tire tracks down the middle?

Stanley R. Michalski Maybe Alaska or Norway ? The lines are caused by: 1) a really big dump truck, 2) millions of migrating lemmings or 3) the rock debris of a medial morain resuting from the top & center of the glacier moving faster than the bottom & sides.  October 22, 2012 at 8:57am·
Russ Colson I vote for the lemmings! Driving a dump truck!  November 2, 2012 at 8:24pm ·
  • Russ Colson Well, only one entry in my October Geoscience Challenge–so the winner is—Stan Michalski! The glacier is the longest in Europe, taken from the Sphinx station, the Top of Europe. Mary and I visited there for our 25th Anniversary in 2010, where we truly were at the top of the world just like I’ve been ever since we got married! The dark “tracks” are indeed lateral moraines dragged into the interior of the ice flow to become medial morraines, debris scraped from the surrounding mountains and entrained in the ice! November 21, 2012 at 11:47am 
  • Mary Colson It’s hard to believe that we were on the JungFrau two and a half years ago! Time just keeps on keepin’ on. We are still at the top of the world :0)  November 21, 2012 at 12:28pm
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