Even with Witzke and Ludvigson writing in 1996, "Usage of the term "Dakota" for western-derived sedimentary sequences in the Rocky Mountain area is discouraged.", such usage remains current. Young's description of the Naturita is consistent with other western descriptions of the Dakota Group. Witzke and Ludvigson, et al, later confirmed palynostratigraphic units in the Dakota from Iowa to the Colorado Front Range and acknowledged the recognition of those sequences throughout the Western Interior. In 2012, the Dakota/Naturita Formation sequence and fossil pollen species in Utah were correlated with Ludvigson's reports on the Dakota at the Nebraska type location.