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5.8: A3 Amphibolite

  • Page ID
    11141
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    Outcrop and Hand Sample Photos and Videos

    Click on the image to enlarge.

    This is a massive amphibolite. The field stop seems to have been used as a rock quarry and dump for road construction. Note the jointing in the rocks (especially in 2nd photo).

    A3-Amphibolite-1-scaled-1.jpg
    A3-amphibolite-2-scaled-1.jpg

    Thin Section Photos and Videos

    1st = plane polarized light; 2nd = cross-polarized light.

    Interlocking clusters of hornblende (amphibole, green in ppl) and quartz.

    A3-amph-4x-ppl-300x225.jpg
    A3-amph-4x-xpl-300x225.jpg

    Entire thin section scan. 1st = ppl; 2nd = xpl. 

    A3-amph-ppl-scaled-1.jpg
    A3-amph-xpl-scaled-1.jpg

    This page titled 5.8: A3 Amphibolite is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Elizabeth Johnson and Juhong Christie Liu (Virtual Library of Virginia) via source content that was edited to the style and standards of the LibreTexts platform; a detailed edit history is available upon request.

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