block diagram of a monoclineThe Grandview-Phantom Monocline in the Grand Canyon, ArizonaMonocline at Colorado National MonumentMonocline formed at tip of small thrust fault, Brims Ness, Caithness, Scotland
A monocline (or, rarely, a monoform) is a step-like fold in rock strata consisting of a zone of steeper dip within an otherwise horizontal or gently dipping sequence.