A [ Back to Main Report ] DEPOSITIONAL SETTINGS AND THEIR INFLUENCE ON COAL RESOURCES About 55 to 60 million years ago when the Fort Union and equivalent coal-forming peat accumulated, the Northern Rocky Mountains and Great Plains region was primarily continental (Brown, 1958).
(equivalent coal-forming peat; accumulated; ) (the Northern Rocky Mountains and Great Plains region; was; primarily continental (Brown)
equivalent coal-forming peat the Northern Rocky Mountains and Great Plains region
accumulated was
primarily continental (Brown