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
Brazos Bend State Park maintenance of a natural landscape. In 1984 the Park was officially opened to the public, its lands having been donated to the state several years previously. In 2009, the Park celebrated its 25th Anniversary with a variety of special events and recognitions. Today the Park is run by the Texas Parks and Wildlife Department, with the assistance of an active non-profit volunteer organization. Although it contains recreational day-use areas (including a dining hall, campground, and picnic areas) Brazos Bend is by primary character a natural park. Its recreational opportunities revolve around enjoyment of its diverse ecosystems and species. Popular activities