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

Uploaded: 7 May 2020
Last Updated: 28 May 2020

381 megapixels
19,404 x 19,632 pixels
64.7 in X 65.4 in at 300dpi
4,139 pixels per inch

A twice-glaciated rock collected from a gravel quarry in western Pennsylvania. Callan Bentley has a blog post about this very cobble here: http://blogs.agu.org/mountainbeltway/2011/03/29/tillite-in-outwash/