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Geosciences LibreTexts

5.8: A3 Amphibolite

  • Page ID
    11141
  • 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).

    Thumbnail for the embedded element "A3 amphibolite"

    A YouTube element has been excluded from this version of the text. You can view it online here: pb.libretexts.org/petrology/?p=309

    Thin Section Photos and Videos

    Click on the image to make it larger. 1st = plane polarized light; 2nd = cross-polarized light.

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

    Entire thin section scan. 1st = ppl; 2nd = xpl. Click on the image to make it larger.