On Friday Brett, Tim, and I headed to West Virginia to look for potential fossiliferous outcrops. One of our stops was along a railroad cut near Kellysville, where there is an exposure of the late Mississippian Bluefield Formation (~325 Ma). The Bluefield is primarily a sandstone, but there are thin beds of limestones that contain some fossils, and one of these beds is exposed along the railroad cut.
There were several different types of brachiopods, including these tiny examples (terebratulids, I believe):
We collected a number of samples for the museum, and Brett collected some for her teaching sets at Patrick Henry Community College. Over the fall, we intend to make numerous day trips into the Appalachians to look at additional Paleozoic localities.