This homework has several aspects: background content, data analysis and reporting it.

Demostrate your content understanding

• 1. (15 pts) View and answer the questions in the Striation Problem.
• 2. (15 pts) Suggest which erosion process(es) acted on this feature and if more than one in what order.

Data Analysis

You gathered data as described in Clast Data Collection

Now what to do with it? (Add your data to the larger data sets and use the combination for these questions and be sure to show any necessary plots to support your answer.)

• 3. (15 pts) Compare the visual sphericity values with Sneed and Folks (S).
  • Sneed and Folk, 1958 suggest that sphericity (S) can be calculated from:
    • S =(cube root of C axis squared) / A axis x B axis
• 4. (15 pts) How representive was your sample?

Reporting

Following the Laboratory Report Format , address the following in +/- 2 pages:

• 5. Using the form measure of your choice (roundness, visual sphericity, or Sneed and Folk sphericity) which alone gives better insight to the differences in the erosion processes between fluvial and glacial settings?

Some background information

25 pts for content

15 pts for presentation

Bonus

(10 pts) Which group one or two is having more fun?

e-mail by 12:00 Friday two separate e-mails

1) a single file with questions 1-4 and

2) a Web ready collection of files for question 5.