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Folds, Faults, and Mountain Types

Folds, Faults, and Mountain Types. Mountains formation – Three types. 1. Volcanic 2. Folded 3. Faulted. Mountains caused by Pressure. As plates move, pressure builds causing bends or breaks in land. Any time crust moves it will cause an earthquake. Folding.

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Folds, Faults, and Mountain Types

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  1. Folds, Faults, and Mountain Types

  2. Mountains formation – Three types • 1. Volcanic • 2. Folded • 3. Faulted

  3. Mountains caused by Pressure • As plates move, pressure builds causing bends or breaks in land. • Any time crust moves it will cause an earthquake

  4. Folding • When rock is put under stress, sometimes it bends… this is called FOLDING. • These make folded mountains.

  5. Folds: • These types of folds are called ANTICLINE folds

  6. Folds: • These types of folds are called SYNCLINE folds.

  7. Folds: • When one side moves up and the other moves down, these types of folds are called MONOCLINE folds

  8. Faults Section • Sometimes rock doesn’t bend, but it breaks instead… this is called FAULTING. • These make Fault-Block Mountains • There are 3 types of faults: • Normal Fault • Reverse Fault • Strike Slip Fault

  9. Normal Faults • The hanging wall moves down relative to the footwall. • Occurs when TENSION causes tectonic plates to move apart. • Happens at a divergent plate boundary

  10. Normal Fault

  11. Reverse Faults • The hanging wall moves up relative to the footwall. (the reverse of a normal fault) • Occurs when COMPRESSION causes tectonic plates to push rocks together. • Happens at a convergent plate boundary.

  12. Reverse Faults View of the hanging wall

  13. Faults Normal Fault Reverse Fault • When rocks are pulled apart • One slab of rock slides DOWNWARD • When rocks are pushed together • One slab of rock slides UPWARD

  14. Strike Slip Faults • When opposing forces called SHEARING cause the rock to break and move horizontally. • The ground appears to move to the left or right. • Happens at a transform plate boundary.

  15. Strike Slip Faults

  16. Review:

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