Stratigraphic and structural discussion bearing essentially on the Cretaceous system in an area of western Nebraska is attempted.

Strata between the base of the Tertiary and the top of the Upper Jurassic Morrison formation are described. Suggested correlation with similar sections in adjoining areas is attempted by means of well logs, electric logs, and limited paleontological studies.

Structural discussion is limited essentially to the data made available by operations and studies accomplished after the discovery of the first commercial oil and gas in western Nebraska.

Brief comments on the structure and stratigraphy of the Tertiary and pre-Cretaceous systems are offered.

End_of_Article - Last_Page 1105------------