References
- Snyder, G. L., 1980 a: Geologic map of the central part of the northern Park Range, Jackson and Routt counties, Colorado. — U.S. Geological Survey Miscellaneous Investigations Series Map 1–1112, 1:48,000, 1 sheet.
- Snyder, G. L. 1980 b: Geologic map of the northernmost Park Range and southernmost Sierra Madre, Jackson and Routt counties, Colorado. — U.S. Geological Survey Miscellaneous Investigations Series Map 1–1113, 1:48,000, 1 sheet.
- Steven, T. A., Lipman, P. W., Hail, W. J. Jr., Barker, F. & Luedke, R. G., 1974: Geologic map of the Durango Quadrangle, southwestern Colorado. — U.S. Geological Survey Miscellaneous Investigations Series Map 1–764, 1:250,000, 1 sheet.