hinge line [′hinj ‚līn]
Hinge Line
(geology)
The line separating the region in which a beach has been thrust upward from that in which it is horizontal.
A line in the plane of a hinge fault separating the part of a fault along which thrust or reverse movement occurred from that having normal movement.
Hinge Line
a line connecting the points of maximum bending of the strata in a fold. If a series of strata is compressed into a
Figure 1. Hinge lines: (a) the hinge line of an anticline, (b) the hinge line of a syncline
fold, each stratum has its own hinge line, and the plane that passes through the corresponding series of hinge lines is called the axial surface of the fold.
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