The Fall Zone delineates the boundary between the Coastal Plain and the Piedmont. Here rivers draining the Piedmont drop steeply to sea level and in the process form dramatic rapids.
The Neoproterozoic Lynchburg Group is a thick sequence of metasedimentary rocks exposed in the eastern Blue Ridge from northern to south-central Virginia. These deposits range from coarse-grained conglomerate to fine-grained mudstone.
Cumberland Gap, elevation 506 m (1,660′), in the far southwestern corner of Virginia is a wind gap near the geographic triple point* between Virginia, Tennessee, and Kentucky. The gap has long been an important crossing point through the Appalachian Mountains, and lies at the western edge of the Valley & Ridge province with the Appalachian Plateau province […]
Many of the highest peaks in Shenandoah National Park (including Hawksbill, Stony Man, and Hightop Mountain, just to name a few) are underlain by distinctive bluish-green rocks that were once ancient lava flows (Virginia is for Lavas!), and are part of a geologic unit known as the Catoctin Formation. From the presidential retreat at Camp David to Jefferson’s […]