Homework #7 Glaciology, GEOL 4888, Spring 2017 Humphrey
1. The Dinwoody Glacier in the
Wyoming Wind River range is about 100m thick (actually it is melting fast and
is now only 90m thick, but use 100m for this question). By looking at historical photos the Response
Time has been estimated at about 200 years.
This implies that the ablation rate in the terminus region is about
what?
2. Can you explain why varved
lacustrine deposits are more common during the waning stages of large ice
sheets than during the advances? And which major instability is this
related to?
3. The retreat of a Fiord type
glacier is typically catastrophic, but the (re) advance is slow and
steady. Describe the advance and retreat
in enough detail to explain this difference.
4. Don’t forget, on Thursday May 5th you will need to have a 5min power-point outline/pop-up talk of your term project. That means an intro slide and only 1 or 2 big point slides, no more! (You will not go over 5 mins!). And the term project will be due on TUESDAY May 10th by 5pm (I need time to mark before I go into the field on the 13th.)