After a centuryRevised Paleogene coal stratigraphy, correlation, and ...
The stratigraphy, correlation, mapping, and depositional history of coalbearing strata in the Paleogene Fort Union and Wasatch Formations in the Powder River Basin were mainly based on measurement and description of outcrops during the early 20th century. Subsequently, the quality and quantity of data improved with (1) exploration and development of oil, gas, and coal during the middle 20th centu