Southwestern Virginia Case Study

A1 Amphibolite

Elizabeth Johnson

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).

 

Thin Section Photos and Videos

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

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

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

Media Attributions

  • A1-amphibolite-1
  • A1-Amphibolite-2
  • A1-amphibolite-3
  • A1 amph 4x ppl
  • A1 amph 4x xpl
  • A1 amph ppl
  • A1 amph xpl

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Introduction to Petrology by Elizabeth Johnson is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License, except where otherwise noted.

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