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

Uploaded: 31 Mar 2020
Last Updated: 9 Jun 2020

254 megapixels
17,665 x 14,374 pixels
58.9 in X 47.9 in at 300dpi
5,840 pixels per inch

It looks like it's the same thing as the lower unit (below the unconformity) at Siccar Point - a graywacke.