5.10: A4 Mylonite 1
- Page ID
- 11143
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Outcrop and Hand Sample Photos and Videos
Click on the image to enlarge.
This is one continuous outcrop containing mylonite 1 (this page) and mylonite 2 (next page). Can you see the mylonite fabric (looks like a foliation) in the rock? The protolith of Mylonite 1 was probably one of the Cranberry Gneiss units.
![A4-Mylonite-1-A-scaled-1.jpg](https://geo.libretexts.org/@api/deki/files/9035/A4-Mylonite-1-A-scaled-1.jpg?revision=1)
![A4-Mylonite-1-B-scaled-1.jpg](https://geo.libretexts.org/@api/deki/files/9037/A4-Mylonite-1-B-scaled-1.jpg?revision=1)
This cut hand sample shows the mylonite texture in more detail.
Thin Section Photos and Videos
1st = plane polarized light; 2nd = cross-polarized light.
Hopefully you can see porphyroclasts (augens) and mylonite texture in the thin section images below. Porphyroclasts are mostly qtz, rusty brown layers are clays produced by shearing.
![A4-Mylonite-1-ppl-4x-300x225.jpg](https://geo.libretexts.org/@api/deki/files/9041/A4-Mylonite-1-ppl-4x-300x225.jpg?revision=1)
![S5-Cranberry-xpl-4x-300x225.jpg](https://geo.libretexts.org/@api/deki/files/9043/S5-Cranberry-xpl-4x-300x225.jpg?revision=1)
Entire thin section scan. 1st = ppl; 2nd = xpl.
![A4-mylonite1-ppl-scaled-1.jpg](https://geo.libretexts.org/@api/deki/files/9045/A4-mylonite1-ppl-scaled-1.jpg?revision=1)
![A4-mylonite1-xpl-scaled-1.jpg](https://geo.libretexts.org/@api/deki/files/9047/A4-mylonite1-xpl-scaled-1.jpg?revision=1)