Folding versus Faulting Mountains
Country: United States
Date: April 11, 2005
How can geologists tell if a mountain chain was formed by
the folding of a rock layers or the faulting of large blocks?
Geologists learn about how things are formed by careful observation. By
looking at the orientation of the minerals in rocks and the orientation of
layers of rocks, they deduce the events that occurred to make mountain
ranges and other geologic features. Sometimes the patterns of orientation
are not obvious at one place, but must be measured at many spots over a
large area and viewed on a map. By looking at these patterns, geologists
can see faults and folds in the rocks.
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Update: June 2012