By: nova-an-slc
Image: Robin Rohrback, Mid-Atlantic Geo-Image Collection
License: Creative Commons Non Commercial ⧉

Uploaded: 8 Jan 2021
Last Updated: 25 Jan 2021

630 megapixels
32,884 x 19,172 pixels
109.6 in X 63.9 in at 300dpi
4,109 pixels per inch

Slate on the left, phyllite on the right. Slate is metamorphosed mudstone or shale, and is the protolith of phyllite.