Geology 103 (Sedimentology and Stratigraphy)
California State University, Sacramento
Week 7: Alluvial fans,
Upon completion of this unit students should be able to:
Describe longitudinal and lateral profiles (shapes) of an alluvial fan.
Discuss the difference between a debris flow and a stream-dominated alluvial fan.
List common features and deposits of an alluvial fan, including grain size patterns (longitudinal and vertical).
Name the parts of an alluvial fan, and discuss the sedimentary structures in each.
Discuss braiding parameter and meander wavelength as a method of classifying stream types (Rust's classification).
Describe the flow, load, gradient, bar forms, bank material and general architecture of a typical braided stream.
Distinguish between longitudinal, linguoid/transverse and lateral bar forms.
Lecture 10: Alluvial fans- Boggs, 5th edition, pp. 208-209, 211-215
Lecture 11: Braided streams- Boggs, 5th edition, pp. 215-220
Fill out a reading log for each reading assignment. Reading logs are due at the start of class on Wednesday
Lab this week-
Drafted stratgraphic columns using Powerpoint. Bring your yellow field notebook to class.