What Forces Created These Geologic Features?
ES1106  Northern Rocky Mountains

Portions of the northern Rocky Mountains represent an example of a folded mountain belt that formed between 100 and 60 million years ago. The fault in this image has been outlined for you.

  !   Interpret the fault. Use the drawing tools to trace a layer that appears on both sides of the fault. Draw arrows to indicate the direction of stress, and answer the questions below.

John Geissman, University of New Mexico


5. Describe how you deduced the type of stress that formed this feature.

6. What type of stress was responsible for building the northern Rocky Mountains?


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