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
Trinity and Brazos Valley Railroad Depot and Office Building NRHP nomination, "Its design and durability indicate the confidence with which the new company began its operations and the importance which the railroad company once placed on it s passenger business." The depot served passengers from 1907 until passenger service was discontinued in 1966. The railroad's offices moved away in 1968 and the depot was sold to the city of Teague in 1979. It became the Burlington and Rock Island Railroad museum in 1970. It is also a Texas State Antiquities Landmark. Trinity and Brazos Valley Railroad Depot and Office Building The Trinity and Brazos Valley Railroad Depot and Office