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

Uploaded: 5 May 2020
Last Updated: 15 May 2020

523 megapixels
30,104 x 17,384 pixels
100.3 in X 57.9 in at 300dpi
3,918 pixels per inch

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. This natural and weathered surface of an amphibolite (very similar in texture and composition to amphibolite seen on the Billy Goat Trail) is intended to correspond with this cut and polished surface of the same specimen: https://viewer.gigamacro.com/view/TeN8dRtyFvqfWwXa To explore an outcrop of amphibolite on the Billy Goat Trail, click here: https://viewer.gigamacro.com/view/ZbrknhGx8B6TESUT