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

Uploaded: 6 May 2020
Last Updated: 4 Jun 2020

1.09 gigapixels
29,840 x 36,544 pixels
99.5 in X 121.8 in at 300dpi
476 pixels per inch

The late Ordovician Edinburg Formation is a transitional unit between the passive margin sedimentation that dominated the Virginia Valley & Ridge province from the Cambrian until the mid-Ordovician and the active margin sedimentation accompanying the Taconian Orogeny (e.g. Martinsburg Formation). Here, both bedding (dipping moderately east / right) and cleavage (subvertical to dipping steeply west / left) may be seen, as well as features accompanying the solution weathering of the carbonate rock. Cleavage is refracted across more and less clay-rich strata.