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Lineations in structural geology are linear structural features within rocks. [1] There are several types of lineations, intersection lineations, crenulation lineations, mineral lineations and stretching lineations being the most common. Lineation field measurements are recorded as map lines with a plunge angle and azimuth.
The intersection of these two planes forms an intersection lineation. This intersection lineation, L 1-2 may approximate the plunge of F2 interference folds. The initial impact of a crenulation foliation may be cryptic, microscopic growth of new minerals at an angle to previous foliations.
Parting lineation, from lower left to upper right; Kayenta Formation, Canyonlands National Park Parting lineation (also known as current lineation or primary current lineation) is a subtle sedimentary structure in which sand grains are aligned in parallel lines or grooves on the surface of a body of sand (or lithified as a sandstone). [1]
Slender prismatic crystals such as amphibole produce a lineation in which these prisms or columnar crystals become aligned. [1] Tectonites are rocks with minerals that have been affected by natural forces of the earth, which allowed their orientations to change. This usually includes recrystallization of minerals, and the foliation formation.
Structural geology is the study of the three-dimensional distribution of rock units with respect to ... the lineation may be measured from the horizontal as a rake or ...
Slickenside formation results in unique roughness on a slip surface. Fault surface roughness (or topography) is characterized by the aspect ratio of asperity height to scale of observation, and this roughness is a key parameter in the study of fault slip. [8]
Lineation may refer to: Lineation (handwriting), use of consistent spacing and letter size in Western handwriting to produce straight lines; Lineation (geology), linear structural features within rocks Parting lineation; Lineation (poetry), the selective arrangement of text into poetic lines
Joints have a profound control on weathering and erosion of bedrock. As a result, they exert a strong control on how topography and morphology of landscapes develop. Understanding the local and regional distribution, physical character, and origin of joints is a significant part of understanding the geology and geomorphology of an area.