Pencil cleavage

Pencil cleavage in geology refers to a cleavage in rock such that long, slender, pencil-shaped fragments of rock are created by fracturing during the weathering of a sedimentary rock. Pencil cleavage is usually associated with rock units that contain high angle of intersection between cleavages, such as a diagenetic cleavage and a later tectonic cleavage.^[1]

References

^ Licker, Mark D. (2002). Dictionary of Earth Science (2. ed.). New York [u.a.]: McGraw-Hill. p. 269. ISBN 0071410457.

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[1] Licker, Mark D. (2002). Dictionary of Earth Science (2. ed.). New York [u.a.]: McGraw-Hill. p. 269. ISBN 0071410457.

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