Sidewalk Fold-and-Thrust Belts
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
Students will think critically about geometries of layers in the hangingwall and footwall with respect to fault ramps and flats.
Other skills goals for this activity
Description and Teaching Materials
- sidewalk chalk
- meter sticks
- large protractors (can do with small ones too, but if you have a ginormous one, that's super!)
- textbook diagram of fault bend fold and fault propagation fold
Instructions to instructor:
Separate the class in to small groups (4-5 students in each. This activity actually works better with larger groups (rather than pairs/threes) because a core of students will take the initiative and start the recreation. The more hesitant students will watch closely and will pipe up when they see the go-getters missing a critical component. It's so neat to watch the group dynamics in this exercise!)
Instruct each group to recreate their assigned diagram (just do 1 per group!) on a sidewalk-scale. Tell them to pay particular attention to the geometries of lines and angles during the exercise. Once they have completed the scaled drawing in sidewalk chalk, you can choose to have them study the geometries and come up with a set of rules for these geometries, or you can lead that discussion (depending on the time you have for this).