Organ Rock Formation Organ Rock Formation The Organ Rock Formation or Organ Rock Shale is a formation within the late Pennsylvanian to early Permian Cutler Group and is deposited across southeastern Utah, northwestern New Mexico, and northeastern Arizona. This formation notably outcrops around Canyonlands National Park, Natural Bridges National Monument, and Monument Valley. The age of the Organ Rock is constrained to the latter half of the Cisuralian Epoch by age dates from overlying and underlying formations. Important early terrestrial vertebrate fossils have been recovered from this formation in northern Arizona, southern Utah, and northern New Mexico. These include the iconic Permian terrestrial
Raven Rocks (rock formation) Gap. The formation is often referred to as "the rollercoaster" by Appalachian Trail hikers as the trail undulates between these spurs and hollows along the western face of the mountain along this stretch of the ridge. The peak is notable for the Crescent Rock cliffs. The Appalachian Trail crosses the saddle of the ridge. Raven Rocks (rock formation) Raven Rocks is spur of Blue Ridge Mountain in Jefferson County, West Virginia. The peak is located just north of Jefferson County's border with Clarke County, Virginia and west of its border with Loudoun County, Virginia. Raven Rocks is formed by the