Physical Setting
Climate
Adaptations
Tucson Plants
Tucson Animals
External Resources
Physical Setting
Climate
Adaptations
Tucson Plants
Tucson Animals
External Resources
Geology: | rock types | faults/folds | real faults/folds | geological concepts | plate tectonics | brief southwest geology | Tucson geology |

FORCES, FAULTS AND FOLDS

Forces, ultimately from plate tectonics, act on rock and cause it to break (fault) or fold (fold).

FORCES:

Tension: pulling apart 
Compression: pushing together 
Shear (Lateral): sliding past

FAULTS: when rocks break due to force. Put mouse cursor in image to see force applied to it.

Normal Fault
Caused by tension
Reverse Fault
Caused by compression
Strike-Slip Fault
Caused by shear (lateral) forces

FOLDS: when rocks bend due to force. Put mouse cursor in image to see force applied to it.

Anticline
Caused by compression
Folded up like an "A"

Syncline
Caused by compression
Folded down like a "U"

Now, are you ready to apply your new knowledge on the real thing?


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