This thesis concerns the depositional environments, reservoir trends, and diagenetic sequences of the Desmoinesian Red Fork sandstone. Electric .logs and gamma-ray logs were used to construct stratigraphic cross-sections, structural geologic maps, log maps, and an isopach map. Analyses of cores, cross-sections, isopach and log maps were used to interpret depositional enviornments and trends of reservoirs. Study of thin sections and scanning-electron photomicrographs of selected samples permitted interpretation of the diagenetic history.