How are the various lineations defined and how do they develop?
What will be an ideal response?
Answer: These are the most important types of lineations: Penetrative lineations are defined by linear elements that penetrate a rock volume. Non-penetrative lineations are confined to a surface. Mineral lineations are defined by aligned elongated minerals. Mineral fiber lineations form by growth of fibrous minerals in a particular direction. Stretching lineations are composed of objects that have been stretched in a preferred direction. Intersection lineations are lineations defined by the line of intersection between two planar structures. Fold axes and crenulation axes are defined by the common orientation of a population of such axes.
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