The main purposes of this thesis are to differentiate and map the diverse and widespread unconsolidated surficial deposits of Quaternary age and to reconstruct the geologic history of the study area. The study area encompasses approximately 150 square miles of North-Central Oklahoma: including the Cimarron River Valley from one mile east of Perkins eastward to Oklahoma Highway 18. This project includes a bedrock geologic map, a surficial geologic map, a geomorphic map, longitudinal profiles of alluvial surfaces, and cross-sections. Field work supplemented by the analysis of longitudinal profiles, aerial photographs, and topographic maps was used in mapping the surficial geology. Structurally, the study area is a part of the Central Oklahoma Platform, west of the Ozark Province and east of Nemaha Ridge. The Cushing Anticline, The Ingall Anticline, The Mehan nose, and The Ripley nose are local structures readily recognized in the subsurface. Geomorphically, the area lies in the Northern Limestone Cuesta Plains Geomorphic Province. The bedrock in the study area is characterized by alternating limestone, shale, and lenticular sandstone and is Lower Permian and Upper Pennsylvanian in age. Regionally, the bedrock within the study is a part of west-dipping homocline which varies from 30 to 50 feet per mile. Four major terraces and related deposits found within the study area are, from the oldest to the youngest, the Paradise Terrace, the Summit View Terrace, the Perkins Terrace, and the Lawrie Terrace. Flood plains border the Cimarron River and its tributaries, Stillwater Creek and Council Creek. Abrupt but subtle changes in flood-plain gradient along the Cimarron River apparently relate to changes in bedrock lithology beneath the bedrock valley. Projection of the Summit View Terrace and the Perkins Terrace on longitudinal profiles possibly indicates a distinct off-set between the north and south sides of the Cimarron River Valley. This off-set appears to be a possible fault system parallel to the axis of the valley. Only one unit of the Paradise Terrace has been mapped in the extreme western part of the study and the remnants of this unit in the rest of the area have possibly eroded away. Sand dunes of two ages (old and young) and eolian sand sheets were differentiated by their topographic feature and thicknesses of the soil developed from the aforementioned units in the study area. Clay mineral analysis of 25 samples collected from unconsolidated materials suggests that clay mineralogy may be useful in correlating terrace deposits that cannot be directly related to terrace surfaces. Clay mineral interpretation shows that most predominate clay constituents are mixed-layer clay, montmorillonite, kaolinite, vermiculite, illite, and chlorite. Grain-size analysis strongly suggests that distinct variations in texture of alluvial deposits are related to the amount of weathering that has occurred.