In-class review: folds
Short in-class review question about using given strike and dip information to classify a fold. Stereonets used.
upper-level structural geology class
Skills and concepts that students must have mastered
plotting strike & dip on a stereonet to determine fold axis, interlimb angles & cylindricity
fold classification schemes
ability to visualize strike & dip in 3D
understanding of rock competencies
How the activity is situated in the course
I've used these both as a quick review at the start of the class after fold classification schemes were discussed (the other material was covered earlier in the semester) and as an in-class quiz. Basically, these are meant to check & make sure students understand the material we just covered.
Content/concepts goals for this activity
manipulation of data on a stereonet
Higher order thinking skills goals for this activity
analysis of data
visualization of data in 3D
Other skills goals for this activity
Description and Teaching Materials
Single sheet that I give to students to work on for 5-10 minutes at the beginning of class. Students should have access to stereonets in order to complete the problems.
Review -- folds (Microsoft Word 33kB Jun18 12)
Teaching Notes and Tips
I tend to encourage the students to work on the sheets alone to start with and then discuss the results as a group and let the students correct one another. I find that question 4 throws them almost every time.
I check verbally to see if all the students (its a small class <8) understand the correct answers and how they were derived. A similar problem was placed on the final, which checked retention over the course of the semester.
References and Resources