By: magic-gigapans
Image: Robin Rohrback, Mid-Atlantic Geo-Image Collection
License: Creative Commons Non Commercial ⧉

Uploaded: 13 May 2020
Last Updated: 15 May 2020

618 megapixels
32,260 x 19,164 pixels
107.5 in X 63.9 in at 300dpi

Amphibolite similar to the amphibolite exposed on the Billy Goat Trail. Amphibolite is a metamorphic rock very rich in the mineral hornblende (an amphibole), which shows up black in this image. The white mineral in the rock is plagioclase feldspar. This is a very mafic metamorphic rock, with large crystals. Amphibolite occurs as large, folded, tabular masses in the area of the Billy Goat Trail.