Folding and Faulting I
Fill in the blanks.

A bend in layered rocks is a(n) . Folding in rock strata is the result of stress. A fold in which the rock layers are folded downward,fold1 with the limbs dipping down toward the axis of the fold, as shown to the right, is a(n) .                      (Side View)




A fold which has been pushed more strongly from one side, so that the limbs dip in the same direction, fold3as shown below left, is a(n) fold.






(Side View)

A fracture in bedrock, along which movement has taken place, is a . A fault in which the movement is parallel to the dip of the fault surface is a fault (hint: the answer here is two words, separated by a hyphen). A normal fault is the result of stress. In a fault, flt3.gif (10078 bytes)the hanging wall block moves down along the dip relative to the footwall block, as shown below.







(Side View)

In a fault (hint: again, the answer here is two words, separated by a hyphen), the movement is primarily horizontal, parallel to the strike of the fault, and the stress involved is shear stress. The fault shown below is an example of a -lateral -slip fault. 

ssr.gif (12090 bytes)

(You are looking down on the fault, and a broken highway, from above, as in a map view).

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