5.6: A1 Amphibolite

Introduction to Petrology · LibreTexts

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    From LibreTexts, under CC BY-NC-SA 4.0, as the source states it; its equations are written in TeX, which the PDF shows typeset. This page at LibreTexts.

    Outcrop and Hand Sample Photos and Videos

    Click on the image to enlarge.

    This is in Galax. Houses were constructed on this site shortly after this field trip. You can see some of the cabins/houses in the background. This is an amphibolite (massive boulders) with some schist on the left side of the first photo. This is on the other side of a hill from A1 B2 Schist (next stop).

    A1-amphibolite-1-scaled-1.jpg
    A1-Amphibolite-2-scaled-1.jpg
    A1-amphibolite-3-scaled-1.jpg
     

    Thin Section Photos and Videos

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

    Garnet surrounded by hornblende and quartz. Look at the inclusions in the garnet porphyroblast.

    A1-amph-4x-ppl-300x225.jpg
    A1-amph-4x-xpl-300x225.jpg

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

    A1-amph-ppl-scaled-1.jpg
    A1-amph-xpl-scaled-1.jpg

    This page titled 5.6: A1 Amphibolite was last modified on Fri, 06 May 2022 21:09:19 GMT and 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.