Dictionary of Geotourism

2020 Edition
| Editors: Anze Chen, Young Ng, Erkuang Zhang, Mingzhong Tian

Lineation

Reference work entry
DOI: https://doi.org/10.1007/978-981-13-2538-0_1402

Lineations are small-scale penetrative linear features in a rock. Based on the time of formation, lineations can be categorised as primary lineations (lineations that formed during rock formation, such as lineations and flow planes in igneous rock and bedding in sedimentary rock) and secondary lineations (lineations that formed after rock formation, such as cleavage, schistosity and stretching lineations). Based on the relationship with the direction of movement, lineations can be divided into A-type lineations (parallel to the movement direction, such as stretching lineations and mineral growth lines) and B-type lineations (perpendicular to the movement direction, such as crenulation lineations).

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