Banks, N. G., Bennett, C. A., and Schmidt, J. M., 1978, Maps of photo lineaments and geomorphologic features in the Spirit Lake quadrangle, Washington: U.S. Geological Survey Open-File Report 78-505, scale 1:48,000. [Includes expanded text on structure of map area] Banks, N. G., Schmidt, J. M., Ashley, R. P., and Bennett, C. A., 1979, Maps showing the results of the preliminary geologic and geophysical studies of northeastern quarter of the Spirit Lake quadrangle, Washington: U.S. Geological Survey Miscellaneous Field Studies Map MF 1046, scale 1:62,500. [Includes expanded text on map units, ages, petrology, history and origin of map units, evaluation of mineral resources] Evarts, R. C., and Ashley, R. P., 1984, Preliminary geologic map of the Spirit Lake quadrangle, Washington: U.S. Geological Survey Open-File Report 84-480. Evarts, R.C., and Ashley, R.P., 1990a, Preliminary geologic map of the Goat Mountain quadrangle, Cowlitz County, Washington: U.S. Geological Survey Open-File Report 90-632, scale 1:24,000, 47 p. Evarts, R.C., and Ashley, R.P., 1990b, Preliminary geologic map of the Cougar quadrangle, Cowlitz and Clark Counties, Washington: U.S. Geological Survey Open-File Report 90-631, scale 1:24,000, 40 p. Evarts, R.C., and Ashley, R.P., 1991, Preliminary geologic map of the Lakeview Peak quadrangle, Cowlitz County, Washington: U.S. Geological Survey Open-File Report 91-289, scale 1:24,000, 35 p. Evarts, R.C., and Ashley, R.P., 1992, Preliminary geologic map of the Elk Mountain quadrangle, Cowlitz County, Washington: U.S. Geological Survey Open-File Report 92-362, scale 1:24,000, 44 p. Evarts, R.C., and Ashley, R.P., 1993a, Geologic map of the Vanson Peak quadrangle, Lewis, Cowlitz, and Skamania Counties, Washington: U.S. Geological Survey Geologic Quadrangle Map GQ-1680, scale 1:24,000. Evarts, R.C., and Ashley, R.P., 1993b, Geologic map of the Cowlitz Falls quadrangle,Lewis and Skamania Counties, Washington: U.S. Geological Survey Geologic Quadrangle Map GQ-1682, scale 1:24,000. Evarts, R.C., and Ashley, R.P., 1993c, Geologic map of the Spirit Lake West quadrangle, Skamania County, Washington: U.S. Geological Survey Geologic Quadrangle Map GQ-1681, scale 1:24,000. Evarts, R.C., and Ashley, R.P., 1993d, Geologic map of the Spirit Lake West quadrangle, Skamania and Cowlitz Counties, Washington: U.S. Geological Survey Geologic Quadrangle Map GQ-1679, scale 1:24,000. Moore, R.B., Thornber, C.R., and Swanson, D.A., 1994, Preliminary geologic map of the Randle quadrangle, Cascade Range, Lewis County, Washington: U.S. Geological Survey Open-File Report 94-715, scale 1:24,000. Swanson, D.A., 1989, Geologic maps of the French Butte and Greenhorn Buttes quadrangles, Washington: U.S. Geological Survey Open-File Report 89-309, scale 1:24,000, 25 p. Swanson, D.A., 1991, Geologic map of the Tower Rock quadrangle, southern Cascade Range, Washington: U.S. Geological Survey Open-File Report 91-314, scale 1 :24,000, 26 p. Swanson, D.A., 1992, Geologic map of the McCoy Peak quadrangle, southern Cascade Range, Washington: U.S. Geological Survey Open-File Report 92-336, scale 1:24,000, 36 p Swanson, D.A., 1993a, Geologic map of the Blue Lake quadrangle, southern Cascade Range, Washington: U.S. Geological Survey Open-File Report 93-297, scale 1:24,000, 34 p. Swanson, D.A., 1994, Geologic map of the East Canyon Ridge quadrangle, southern Cascade Range, Washington: U.S. Geological Survey Open-File Report 94-591, 31 p. Swanson, D.A., 1996, Geologic map of the Hamilton Buttes quadrangle, southern Cascade Range, Washington: U.S. Geological Survey Open-File Report 96-0016, 29 p.