Truncated spurs can be found within mountain ranges, along the walls of river valleys, or along coastlines.
[1][2] Before glaciation, relatively immature rivers display a pattern of interlocking spurs.
This is a geologically active process where the glacier continues to gradually erode the valley sides.
These triangular facets provide evidence for recent fault movement and are used in seismotectonic analysis.
[3] Classic examples of faceted spurs can be found all along the Central Wasatch Fault, north-central Utah.