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
Brazos Bend State Park river otter. The most noteworthy and popular residents of the park are the relatively large population of American alligators. The park is open year-round, with the exception of several weekends a year during which it is closed for controlled hunts to manage the white-tailed deer population. Brazos Bend State Park occupies land bordering the Brazos River and includes within its boundaries low-lying areas left over from the River's previous meanderings. Pre-Columbian inhabitants included a series of Native American groups, most notably the Karankawa. The land passed through a variety of landowners' hands, resulting in some of the existing structures on