Fruitland Formation the Colorado-New Mexico state line, and is one of the most productive areas for coalbed methane in the United States. The Fruitland is underlain by the Pictured Cliffs Sandstone, and overlain by the more recent Kirtland Formation. The sequence of rocks represents the final filling of the Cretaceous seaway. The underlying Pictured Cliffs is a marginal marine sandstone, deposited in an environment similar to offshore barrier islands of the southeast United States. As the seaway retreated, the Pictured Cliffs was covered by the Fruitland Formation, which was deposited in near-shore swampy lowlands. The formation is dated to the late Campanian
Acadia Cliffs State Nature Preserve The name derives from the fact that the land was formerly owned by the Acadia Coal Company. The property includes an old millstone quarry, and many old millstones can still be seen on the site, now back in the forest. This nature preserve was established in part to protect the Bradley's spleenwort, "Asplenium bradleyi", which grows there. The spleenwort is a state-listed plant species. Acadia Cliffs State Nature Preserve Acadia Cliffs State Nature Preserve is a state nature preserve in Washington County, Ohio, United States, with a small neck extending into Athens County, Ohio. Covering an area of , it