[en] The Raton quadrangle in northern New Mexico lies principally within the Southern Rocky Mountains and Great Plains Province. The eastern half of the quadrangle contains portions of the Raton and Las Vegas Basins, and the Sierra Grande Arch in the Great Plains Province. The west is dominated by the Sangre de Cristos and related mountain ranges of the Southern Rockies, but grades into the Rio Grande Rift Zone in the far west. Many areas in the quadrangle contain significant amounts of Cretaceous through Quaternary igneous rocks of a variety of types. Magnetic data reflect both deep and shallow sources. The basins show as regions of low frequency low amplitude wavelengths except where significant amounts of igneous rocks are exposed. The Raton quadrangle has been unproductive in terms of uranium. All known uranium occurrences to date have proven uneconomic. A total of 98 uranium anomalies are valid according to the criteria set forth in Volume I. These anomalies are scattered throughout the quadrangle. However, they fail to outline the most significant area in terms of its count rate, because of extremely high apparent thorium concentrations