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
Starved Rock State Park the National Register it had been determined that there were three "village and mound" sites within the park. Besides Corbin Farm and Little Beaver, the Simonson site, an open-air occupation site, is also considered a village and mound site. Simonson Site has faced significant alterations over the years Approximately 150 different types of plants grow at Starved Rock State Park. On the sandstone cliffs of Starved Rock State Park white pine, Canada yew and northern white cedar are found; these plants are more commonly found further north. On the surfaces of the canyons and cliffs, where it is cooler, other