# Striation

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> Source: https://en.wikipedia.org/wiki/Striation
> Source revision: 1139357071
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

{{Wiktionary}}
'''Striations''' means a series of [ridges](/source/ridges), furrows or [linear](/source/linear) marks, and is used in several ways:

* [Glacial striation](/source/Glacial_striation)
* [Striation (fatigue)](/source/Striation_(fatigue)), in material
* [Striation (geology)](/source/Striation_(geology)), a ''striation'' as a result of a geological [fault](/source/Fault_(geology))
* [Striation Valley](/source/Striation_Valley), in Antarctica
* In [hyperbolic geometry](/source/hyperbolic_geometry), a ''striation'' is a reflection across two parallel mirrors.
* In anatomy, [striated muscle](/source/striated_muscle)
* In acoustic phonetics, ''striations'' are vertical bands on a [spectrogram](/source/spectrogram) associated with pulses of the vocal folds when producing [voiced](/source/Voice_(phonetics)) [periodic](/source/Periodic_function) sounds.
* Striations can be found in certain [glasses](/source/Glass). These have been caused by [turbulent flow](/source/turbulent_flow) during teeming (pouring) of the glass.
* Striations can be observed in [clouds](/source/clouds). See [Barber's pole](/source/Barber's_pole).
* [Ballistic fingerprinting](/source/Ballistic_fingerprinting)

{{disambiguation}}

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Adapted from the Wikipedia article [Striation](https://en.wikipedia.org/wiki/Striation) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Striation?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.