Shape of gravel particles. What does it mean?
Skills and concepts that students must have mastered
How the activity is situated in the course
Content/concepts goals for this activity
Higher order thinking skills goals for this activity
Other skills goals for this activity
Description of the activity/assignment
Determining whether students have met the goals
Teaching materials and tips
- Activity Description/Assignment (Microsoft Word 55kB Jul3 06)
- Instructors Notes (Microsoft Word 30kB Jul3 06)
- Plot of clast shapes (Acrobat (PDF) 502kB Jul3 06)
- Roundness vs. sphericity in modern glacial environments (Acrobat (PDF) 212kB Jul3 06)
- Roundness diagram (Acrobat (PDF) 168kB Jul3 06)
- Sphericity form diagram (Acrobat (PDF) 276kB Jul3 06)
- Template for curvature (Acrobat (PDF) 247kB Jul3 06)
Boulton, G.S., 1978, Boulder shapes and grain-size distributions of debris as indicators of transport paths through a glacier and till genesis, Sedimentology, 25, 773-799.
Dobkins, J.E. and R.L. Folk, 1970, Shape development on Tahiti-Nui. Journal of Sedimentary Petrology, 40, 1167-1203.
Dowdeswell, J.A., Hambrey, M.J. and W. Ruitang, 1985, A comparison of clast fabric and shape in Late Precambrian and modern glacigenic sediments., Journal of Sedimentary Petrology, 55, 691-704.
Gale, S. J., 1990, The shape of beach gravels, Journal of Sedimentary Petrology, 60, 787-789.
Gale, S.J. and P.G. Hoare, 1991, Quaternary Sediments, Petrographic Methods for the Study of Unlithified Rocks, Belhaven Press, p. 101-125.** required reading for the assignment.
Krumbein, W.C., 1941, Measurement and geological significance of shape and roundness of sedimentary particles, Journal of Sedimentary Petrology, 11, 64-72.
Sneed, E.D. and R.L. Folk, 1958, Pebbles in the lower Colorado River, Texas a study in particle morphogenesis, The Journal of Geology, 66, 114-150.
Stratten, T. 1974, Notes on the application of shape parameters to differentiate between beach and river deposits in southern Africa, Transactions of the Geological Society of South Africa, 77, 59-64.