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

Uploaded: 31 Mar 2020
Last Updated: 26 May 2020

1.07 gigapixels
37,408 x 28,492 pixels
124.7 in X 95.0 in at 300dpi
3,511 pixels per inch

This sat in a non-airtight hallway display case. Coal sitting atop it weathered and deposited yellowish melanterite on the sample. This was initially imaged on March 29, 2015. Compare it with this image taken on April 12, 2018: https://viewer.gigamacro.com/view/tjlYRjYuTiCSsQpU