Mica fish are lenticular, elongate lozenge, parallelogram-shaped, or lens-shaped (roughly fish-shaped) single mica crystals that are often used as shear sense indicators.[1] They commonly occur in micaceous quartzitic mylonites. They characteristically lie with their longest dimension at a small angle to the mylonitic foliation.
![](http://178.128.105.246/cars-http-upload.wikimedia.org/wikipedia/commons/thumb/e/e8/Mica-fish.jpg/220px-Mica-fish.jpg)
References
edit