footwall => block below fault plane All possible types of movement are possible (only know relative movement of one block with respect to the other) Faults named according to the largest direction of movement: Dip-slip faults => movement parallel to dip of fault plane Normal faults - headwall moves down (form during extension) Reverse faults - headwall moves up (compression) Thrust faults - very low-angle reverse fault (compression) Block of rock pushed horizontally Older rocks slide over younger Very important in mountain belts Strike-slip faults => movement is horizontal (one block slides past another) Right- and left-lateral slip (look across fault and see which way the opposite block is moving) San Andreas is a right-lateral fault The space-shuttle photo below shows the San Andreas Fault to the southwest of San Francisco.
(The space-shuttle photo below; shows; the San Andreas Fault; to the southwest of San Francisco) (movement parallel to dip of fault plane Normal faults - headwall moves down (form during extension) Reverse faults - headwall moves up (compression) Thrust faults; pushed; horizontally; Older rocks slide over) Context(movement parallel to dip of fault plane Normal faults - headwall moves down ( form during extension ) Reverse faults - headwall moves up ( compression ) Thrust faults pushed,List([229, 457))):(block below fault plane All possible types of movement; are; possible) Context(movement parallel to dip of fault plane Normal faults - headwall moves down ( form during extension ) Reverse faults - headwall moves up ( compression ) Thrust faults pushed,List([229, 457))):(Faults; named; according to the largest direction of movement)
movement parallel to dip of fault plane Normal faults - headwall moves down ( form during extension ) Reverse faults - headwall moves up ( compression ) Thrust faults pushed,List([229, 457)) movement parallel to dip of fault plane Normal faults - headwall moves down ( form during extension ) Reverse faults - headwall moves up ( compression ) Thrust faults pushed,List([229, 457))
The space-shuttle photo below movement parallel to dip of fault plane Normal faults - headwall moves down (form during extension) Reverse faults - headwall moves up (compression) Thrust faults block below fault plane All possible types of movement Faults
shows pushed are named
the San Andreas Fault to the southwest of San Francisco
horizontally Older rocks slide over
possible
according to the largest direction of movement