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

Uploaded: 26 Mar 2020
Last Updated: 4 Jun 2020

1.38 gigapixels
47,700 x 29,000 pixels
159.0 in X 96.7 in at 300dpi
8,032 pixels per inch

In the George Washington National Forest, south of Duncan Knob, there is a small outcrop of late-Ordovician aged Martinsburg Formation. These turbidites often show fine graded beds, like this one. This sample has been ground and polished to a level of 800 grit. Contrast it with this sample, which saw 13000 polish: https://viewer.gigamacro.com/view/Nm2sCBkUrgQ8RlJl