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A fold trace marking a single step in level strata.
Also known as: Monoclinal fold symbol, Step fold symbol
On a geological map a monocline is drawn as an axial trace marking a single step in otherwise horizontal strata, a fold with one limb rather than two.
Marks a fold with a single dipping limb between two areas of level strata.
Contexts: Maps
Often overlies a fault in the basement beneath, the fold being the flexure of the cover over a break that does not reach the surface.
Contexts: Maps
An axial line with arrows on one side only, marking the single dipping limb.