5.14: Unicoi 3 Conglomerate

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ELIZABETH A. JOHNSON

OUTCROP AND HAND SAMPLE PHOTOS AND VIDEOS

There are at least two conglomerate beds in this outcrop. These images show the conglomerate with the larger (cm-sized) clast size.

The videos below show both the larger and smaller clast sizes.

Thin Section Photos and Videos

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

The thin section images are from the smaller clast size conglomerate. This close-up shows clasts of quartzite (top), k-feldspar/granite (bottom right), and shale (bottom left). There are also volcanic clasts in these rocks. The volcanics are from the Mount Rogers complex – remember this from the history of magmatism in VA?