Interlocking Spurs – A series of ridges projecting out on alternate sides of a valley and around which a river winds its course
Interlocking fingers remind us of interlocking spurs because that is exactly what interlocking spurs look like.
Interlocking slopes are convex (rounded) slopes that extend alternately from opposite sides of a valley, each one fitting into the "gap" between two similar slopes on the other side. They fit together rather like the teeth of a zip.
Interlocking spurs are created over vast periods of time by a river eroding the landscape in its upper course. The river winds and bends as it meets resistance from harder rock.