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This illustration shows the Appalachian Mountains, a region of numerous flexures on a grand scale, as well as many faults; some flexures having a span of several miles, and others only a few feet or inches.

Appalachian Mountains

This illustration shows the Appalachian Mountains, a region of numerous flexures on a grand scale, as…

Block diagram of the uniclinal ridges of the Appalachian type; the original anticline from which the uniclines are cut was asymmetric, with the steeper limb on the west.

Uniclinal Ridges

Block diagram of the uniclinal ridges of the Appalachian type; the original anticline from which the…