| 1:62,500 | 1956 | Geologic Map of the Laytonville Valley Area, Mendocino County, California, Showing Location of Wells, United States Department of the Interior, Geological Survey | USGS – 1956 – Laytonville.pdf |
| 1:100,000 | 1989 | Reconnaissance geologic map of the Covelo 30- by 60-minute Quadrangle, Northern California (No. MF – 2001). United States Geological Survey. Jayko, A.S., Blake, M.C., McLaughlin, R.J., Ohlin, H.N., Ellen, S.D., Kelsey, H.M. | Jayko et al – 1989 – Covelo.pdf |
| 1:250,000 | 1960 | Geologic map of California : Ukiah sheet. Jennings, C.W., Strand, R.G | Jennings and Strand – 1960 – Ukiah.pdf |
| 1:250,000 | 2012 | Aeromagnetic and Aeromagnetic-based Geologic Maps of the Coastal Belt, Franciscan Complex, Northern California, V.E. Langenheim, R.C. Jachens, C.M. Wentworth, and R.J. McLaughlin | Langenheimet al – 2012 – sheet1.pdf Langenheim et al – 2012 – sheet2.pdf Langenheim et al – 2012 – sheet3.pdf Langenheim et al – 2012 – pamphlet.pdf |
| 1:>1,000,000 (Figure 3) | 1960 | Geologic reconnaissance of the northern Coast Ranges and Klamath Mountains, California, with a summary of the mineral resources. Irwin, W.P. California Division of Mines | Irwin 1960 Geologic Recon.pdf |
| 1:>1,000,000 (Figure 2) | 2013 | Previously unrecognized regional structure of the Coastal Belt of the Franciscan Complex, northern California, revealed by magnetic data. Geosphere 9, 1514–1529. Langenheim, V.E., Jachens, R.C., Wentworth, C.M., McLaughlin, R.J. doi:10.1130/GES00942.1 | Copyrighted material |