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

Uploaded: 3 Apr 2020
Last Updated: 29 May 2020

660 megapixels
30,120 x 21,919 pixels
100.4 in X 73.1 in at 300dpi
6,775 pixels per inch

Taconian intrusive (zircon U/Pb age of 435 +/- 15 Ma) with magmatic epidote, indicating a ~30 km crystallization depth. More: http://www.nvcc.edu/home/cbentley/geoblog/2009/05/petrology-trip-5-ellicott-city.html