Duplex

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Duplex structure within lake beds of the Portland Formation, Hartford rift basin, Massachusetts. Faults are shown by thick light lines; bedding is shown by thin black lines. The duplex consists of low-angle floor and roof thrusts and higher-angle imbricates. Notice that the dip-angle of the imbricates generally decreases from right to left. Photo credit: Roy W. Schlische.
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