7.1 Nature of Earthquakes Vocabulary

3. A circular anticline.
5. A fold in rocks that bends downward, in which the youngest rocks are at the center.
7. A break in rock caused by stresses.
8. The change of shape that a rock undergoes when it has been altered by stresses. Also called strain.
10. A fault in which the dip of the fault plane is inclined relative to the horizontal.
12. Strain that alters the shape of a rock but that is not permanent.
15. Force per unit area in a rock.
16. A bend in a set of rocks that causes them to be inclined relative to the horizontal.
18. A reverse fault in which the dip of the fault plane is nearly horizontal.
19. A fault in which the dip of the fault plane is vertical.
22. Stresses that push toward each other. This causes a decrease in the space a rock takes up.
23. Stresses that pushed past each other in opposite directions.
24. A fold that arches upward, in which the older rocks are in the center and the younger rocks are at the outside.
25. A dip-slip fault in which the hanging wall drops down relative to the footwall.

1. A dip-slip fault in which the hanging wall pushes up relative to the footwall.
2. The block of rock that is beneath a dip-slip fault.
4. A break in rock caused by stresses along which there is no movement.
6. The stress due to the weight of material above a buried object.
9. A block of rock that has slipped downward between two normal faults.
11. The block of rock that is above a dip-slip fault.
13. Deformation in a rock that is due to a stress that exceeds the rock’s internal strength.
14. The distance rocks move along a fault.
17. Strain that causes deformation in which the rock deforms but does not return to its original shape when the strain is removed.
20. The upward rise of rock material.
21. Stresses that pull material in opposite directions so that it is pulled apart.