• Pick the relative order of events for this sequence (Don’t forget the unconformity!) (See Figure 1)
_ Young
_ Old
2) For Fault F in Figure 1
- a) Is the fault a normal, reverse or thrust fault?
- b) Explain your reasoning for 2a.
- c) Was the force that created this fault: tensional, compressional, or shear?
- d) Is this fault active or not?
3) Describe how you would tell the difference between an anticline and a syncline in the field (as exposed in an outcrop/or on the ground). Be sure to discuss for each:
• the relative age of the rocks exposed in the center of the fold relative to the limbs,
• the dip of the limbs,
• and the direction the “vee” would point for if it is plunging
• the force that creates folds like this, (shear, tension, compression)
4) Describe Andean Type Mountain Building. Discuss the relationship and formation of the rock units: granite, basalt, and andesite. Also, the formation and relationship of these features: subduction and trench, andesite volcanos, accretionary wedge, continental arc, and the fore arc basin.
Extra Credit
1) 2 points What is this structure? How could it be caused by crustal deformation? Hint: Look up the specific definition of superposition. It has nothing to do with extraterrestrial impacts. This is hard so don’t stress if you can’t figure it out! See Figure 2.
2) 1 point What’s wrong with this picture? This is simple, don’t over think it! Hint it’s not the dinosaurs. See Figure 3.
Sample Solution