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A strike line with a tick, for a plane of splitting.
Also known as: Rock cleavage symbol, Slaty cleavage symbol
On a geological map cleavage is drawn as a strike line with a dip tick, recording a plane along which the rock splits, produced by deformation rather than by bedding.
Marks the orientation of a cleavage plane at the point of measurement.
Contexts: Maps
Is what makes slate split into sheets, and is oriented by the direction of deformation rather than by the original bedding it cuts across.
Contexts: Maps
A strike line with a single tick down the dip, drawn in a style distinguishing it from both bedding and foliation.