40Ar/39Ar ages of late Cenozoic volcanic rocks within and around the Carbondale and Eagle collapse centers, Colorado: Constraints on the timing of evaporite-related collapse and incision of the Colorado River - Kunk, Michael; Budahn, James; Unruh, D.; Stanley, Josette; Kirkham, R. M.; Bryant, Bruce; Scott, R.; Lidke, David; Streufert, R. (GSA Special Papers, 2002)