Boudins or Pillows?

Surface of quarried block in the Catoctin Formation.

This is going to be trouble…

Virginia is for Lavas- The Catoctin Formation

VAlavas

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 […]