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

Uploaded: 29 Apr 2020
Last Updated: 18 May 2020

131 megapixels
15,625 x 8,407 pixels
52.1 in X 28.0 in at 300dpi

The ancient erosional surface between the Archean rocks of the Wyoming Terrane basement complex and the overlying Flathead Sandstone (Cambrian in age), with a rubbly conglomerate at its base.