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
Waitabit Cliffs Waitabit Cliffs Waitabit Cliffs () is a line of sedimentary cliffs on the east coast of Alexander Island, Antarctica, which faces east onto George VI Sound and extends 3 nautical miles (6 km) north from the mouth of Mercury Glacier. The cliffs were probably first sighted by Lincoln Ellsworth, who flew directly over it and photographed segments of this coast on November 23, 1935. First roughly surveyed in 1936 by the British Graham Land Expedition. Resurveyed in 1949 by the Falkland Islands Dependencies Survey, at which time the rock strata were independently examined by members of the party at two