Objectives:
Investigate the processes of gravity-flow deposition and the resulting diamicton properties.
Reading:
Note: This is a bit long. The high points are on the handout in class. You may find that a detailed reading of this is not necessary to do the homework, but be familar with the concepts. Especially view the photographs. The idea is to develop a set of tools so that you can identify the various sediment deposition processes.
Lawson, D.E., Sedimentological analysis of the western terminus region of the Matanuska Glacier, Alaska, CRREL Report 79-9. Chap 5. Be aware of errata pages. .
Questions:
Place into Lawson's classification the following examples (10 pts each):
1. Ned's Flow
2. Beadmore Flow and side view of the flow.
3. Iceland Close-up Note the ice ax lies across the flow-glacier contact. Describe the material at the same level as yellow loop on the ice ax.
4. Use the Matanuska Margin photo. Delineate the areas where you would find the different flow types.
Based on Field Observations
6. (15 pts) For the outcrop you studied in lab, describe according to the various till properties in the handout. Include a diagram of your outcrop.
7. (10 pts) Make and defend an interpreation of the any diamictons in your section.
BONUS
(25 pts) I stated in class that flow tills are the most common tills in southern Ohio (this is not true everywhere). Suggest a reason why.
