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This paper is based on personal, detailed studies in the field by the authors during a period of ten months in 1920, 1921, and 1926. In it the authors summarize briefly the drilling activities and results obtained thereby in parts of southeastern Utah; they explain the age and mode of formation of salt domes in southeastern Utah and possibly in southwestern Colorado, and point to the relation of earlier periods of folding to post-Cretaceous folding. They also explain the relation of intense post-Cretaceous faulting to lines of salt cores encountered along the major axes of many of the superimposed anticlines of post-Cretaceous age. Possible subsurface conditions of deeper-seated, non-faulted salt domes or necks are described, and decidedly favorable geological conditions for the accumulation of oil and gas in large commercial quantities are mentioned. Recently mapped anticlines of the Green River Desert, which may nterfere to some extent with the large gathering area of the Elk Ridge Anticline, are cited. The urgent need for more detailed, painstaking geological research work, in order to define periods of folding and uplift more accurately and to locate test wells more favorably, is pointed out. Actual occurrences in the region are cited, and maps, cross-sections, well logs, and photographs accompany the paper the better to prove and illustrate the conclusions. The authors invite constructive criticism and discussion.