parting lineation

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A series of parallel, linear, low-relief ridges and hollows, spaced a few millimetres apart, seen on bedding planes in parallel-laminated sandstones. The lineation is the preserved trace of primary current lineations formed when plane-bedded sand is deposited from a high-velocity and usually shallow flow of water. The lineation is oriented parallel to the flow direction. See bed form.

Subjects: Earth Sciences and Geography.

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