1. Pop Quiz Sedimentology - Rounding & Sphericity

2. Objectives: Observe & record what you see. 1)What is the dominant condition ( Can you see the forest for the trees? ) 2)Understand what you observe : implications (circumstances of deposition) ; interpret (PM - Kind)

3. For each of the following images: Using the following table, assign appropriate Roundness and Sphericity classes: [ refer to slide 30, Module 4: Sedimentology, or p. 2-39 in Field Book for Sampling … (ver. 2) ]

4. 1 After Powers, 1953. 2 Numerical values below roundness and sphericity columns are class midpoints ( median rho values; Folk, 1955 ) used in statistical analysis. ( p. 2-39, Field Book … ; Schoeneberger, et al, 2002 ) Sphericity

9. (Degree of ) Rounding?

10. (Degree of) Rounding?:

11. (Degree of) Rounding?: (Type of) Packing?: PM: consolidated lahar Lava Cap Winery, CA Schoeneberger