Sideling Hill Road Cut

We have driven from southeastern Missouri to Pennsylvania in two days.

On the last leg of the trip, driving across far northern Maryland on I 68, across the dramatic folding of the Appalachian Mountains, we found this huge road cut.

Here are multiple layers of sedimentation laid down 330-345 million years ago, covered by many later layers, hardened into sedimentary rock, folded, eroded, and now, lucky for us, revealed in this huge road cut.

Here's a good site for an explanation of this place:

http://www.mgs.md.gov/esic/brochures/sideling.html