FAULT, FLOWER OR PALM TREE STRUCTURE
ALONG
In pull-apart basins, the down dropping in negative flower structures
can form major basins call "pull-apart" basins. On the other
hand a positive flower may give rise to pop outs or compressed or
transpressed rocks coming up above. These structures are similar to the
ones formed by transpression or transtension but the mode of their origin
is different. Positive (upthrust) flower structures are compressional duplexes that
form along constraining bends as a result of reverse faulting. But
negative (down-dropped) flower structures are extensional duplexes that
form along releasing bends as a result of normal faulting. Upthrusted,
positive flower structures can form crustal bulges along a fault zone that
can produce uplifted mountain ranges or major seismically potential zones.
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