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
Trödelsteine (rock formation) Trödelsteine (rock formation) The Trödelsteine, also called the Trödelstein, is a rock formation near Emmerzhausen in the county of Altenkirchen in the German state of Rhineland-Palatinate. It consists of columnar basalt and a basaltic blockfield in the Heller Upland. The rock formation has been designated as a natural monument, about 0.3 hectares in area. The Trödelsteine lies about 1.2 kilometres northeast of Emmerzhausen, 3.6 km southwest of Burbach and 2.6 km northwest of Lippe, which are both in the neighbouring county of Siegen-Wittgenstein in North Rhine-Westphalia. The rocks extend up to the summit of the mountain on which they are