References for the Thaden, R.E., and Zech, R.S., unpublished geologic map of the northwest
quadrant of New Mexico.

    Akers, J.P., 1964, Geology and ground water in the central part of Apache County, 
          Arizona: U.S.Geological Survey Water-Supply Paper 1771, 107 p., plate 1, 
          scale 1:125,000.
     Anderson, O.J., 1981, Geologic map of the Cantaralo Spring quadrangle, Cibola County,
          New Mexico: New Mexico Bureau of Mines and Mineral Resources Open-File Report 142,
          scale 1:24,000.
     Anderson, O.J., 1982, Geologic map of the Venadito Camp quadrangle, Cibola County, New
          Mexico: New Mexico Bureau of Mines and Mineral Resources Open-File Report 163, 
          scale 1:24,000.
     Anderson, O.J., 1982, Geology and coal resources of the Atarque Lake quadrangle, 
          Cibola County, New Mexico: New Mexico Bureau of Mines and Mineral Resources 
          Open-File Report 167, scale 1:24,000.
     Anderson, O.J., 1982, Geology and coal resources of Mesita de Yeso quadrangle, Cibola
          County, New Mexico: New Mexico Bureau of Mines and Mineral Resources Open-File 
          Report 171, scale 1:24,000.
     Anderson, O.J., and Mapel W.J., 1983, Geology and coal resources of the Shoemaker 
          Canyon SE quadrangle, Cibola County, New Mexico: New Mexico Bureau of Mines and 
          Mineral Resources Open-File Report 172, scale 1:24,000.
     Bachman, G.O., and Dane, C.H., 1962, Geologic map of the northeastern part of New 
          Mexico: U.S. Geological Survey Miscellaneous Investigations Series Map 1-358, 
          scale 1:380,160.
     Brown, L., 1983, Geologic and isopach maps of the Bisti, De-na-zin, and 
          Ah-she-sle-pah wilderness study areas, San Juan County, New Mexico: U.S. 
          Geological Survey Miscellaneous Field Studies Map MF-1508-A, scale 1:50,000.
     Byers, V.P., 1979, Geologic map and sections of the Crystal quadrangle, San Juan and 
          McKinley Counties, New Mexico: U.S. Geological Survey Open-File Report 79-599, 
          scale 1:24,000.
     Byers, V.P., 1980, Geologic map and sections of the Sonsela Butte 4 SE quadrangle, 
          Apache County, Arizona, and San Juan and McKinley Counties, New Mexico: U.S. 
          Geological Survey Open-File Report 80-788, scale 1:24,000.
     Campbell, F., 1981, Geology and coal resources of Cerro Prieto and the Dyke 
          quadrangles, Valencia County and Catron County, New Mexico: New Mexico 
          Bureau of Mines and Mineral Resources Open-File Report 144, 2 maps, scale 
          1:24,000.
     Condon, S.M., 1986, Geologic map of the Hunters Point quadrangle, Apache County, 
          Arizona, and McKinley County, New Mexico: U.S. Geological Survey Geologic 
          Quadrangle Map GQ-1588, scale 1:24,000.
     Hackman, R.J., and Olson, A.B., comps., 1977, Geology, structure, and uranium 
          deposits of the Gallup 1x2 degree quadrangle, New Mexico and Arizona: U.S. 
          Geological Survey Miscellaneous Investigations Series Map 1-981, scale 
          1:250,000.
     Haynes, D.D., Vogel, J.D., and Wyant, D.G., comps., 1972, Geology, structure, 
          and uranium deposits of the Cortez quadrangle, Colorado and Utah: U.S. Geological 
          Survey Miscellaneous Investigations Series Map 1-629, scale 1:250,000.
     Huffman, A.C., Jr., 1976, Preliminary geologic map of the San Spring quadrangle, San 
          Juan County, New Mexico: U.S. Geological Survey Open-File Report 76-408, 
          scale 1:24,000.
     Huffman, A.C., Jr., and Jones, T.W., 1978, Preliminary geologic map of the Redrock 
          Valley SE quadrangle, Apache County, Arizona and San Juan County, New Mexico: 
          U.S. Geological Survey Open-File Report 78-404, scale 1:24,000.
     Johnson, W., 1962, Water in the Coconino Sandstone for the Snowflake-Hay Hollow area, 
          Navajo County, Arizona: U.S. Geological Survey Water-Supply Paper 1539-S, 
          plate 1, scale 1:125,000.
     Johnson, R.B., comp., 1969, Geologic map of the Trinidad quadrangle, south-central 
          Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map 1-558,
          scale 1:250,000.
     Kelley, V.C., 1972, Geology of the Fort Sumner Sheet, New Mexico: New Mexico 
          Bureau of Mines and Mineral Resources Bulletin 98, map 1 (west) (Geologic map of 
          the Pedernal Hills-Gallinas Mountains-Vaughn area), scale 1:190,000.
     Kelley, V.C., 1978, Geology of the Espaņola Basin, New Mexico: New Mexico Bureau 
          of Mines and Mineral Resources Geologic Map 48, scale 1:125,000.
     Kirk, A.R., and Sullivan, M.W., 1987, Geologic map of the Dalton Pass quadrangle,
          McKinley County, New Mexico: U.S. Geological Survey Geologic Quadrangle Map 
          GQ-1593, scale 1:24,000.
     Kirk, A.R., and Zech, R.S., 1984, Geologic map of the Oak Spring quadrangle, McKinley 
          County, New Mexico: U.S. Geological Survey Geologic Quadrangle Map GQ-1583, 
          scale 1:24,000.
     Kirk, A.R., and Zech, R.S., 1987, Geologic map of the Big Rock Hill quadrangle, 
          McKinley County, New Mexico: U.S. Geological Survey Geologic Quadrangle Map 
          GQ-1594, scale 1:24,000.
     Kirk, A.R., and Zech, R.S., 1987, Geologic map of the Hard Ground Flats quadrangle,
          McKinley County, New Mexico: U.S. Geological Survey Geologic Quadrangle Map 
          GQ-1592, scale 1:24,000.
     Lipman, P.W., 1975, Geologic map of the lower Conejos River Canyon area, southwestern 
          San Juan Mountains, Colorado: U.S. Geological Survey Miscellaneous Investigations 
          Series Map I-901, scale 1:48,000.
     Lipman, P.W., and Pallister, J.S., unpublished reconnaissance geologic map of the 
          Taos Plateau and vicinity, Taos County, New Mexico, scale 1:125,000.
     Lipman, P.W., Pallister, J.S., and Sargent, K.A., 1979, Geologic map of the Mount 
          Taylor quadrangle, Valencia [now Cibola] County, New Mexico: U.S. Geological 
          Survey Geologic Quadrangle Map GQ-1523, scale 1:24,000.
     Machette, M.N., comp., 1978, Preliminary geologic map of the Socorro 1x2 degree 
          quadrangle, central New Mexico: U.S. Geological Survey Open-File Report 78-607, 
          scale 1:250,000.
     Manley, K., Scott, G.R., and Wobus, R.A., comps., 1987, Geologic map of the Aztec 
          1x2 degree quadrangle, northwestern New Mexico and southern Colorado: U.S. 
          Geological Survey Miscellaneous Investigations Series Map I-1730, scale 
          1:250,000.
     Mapel, W.J., 1985, Geologic map of the Nicoll Lake quadrangle, Cibola and McKinley 
          Counties, New Mexico: U.S. Geological Survey Miscellaneous Field Studies Map 
          MF-1757, scale 1:24,000.
     Mapel, W.J., 1985, Geologic map of the Togeye Lake quadrangle, Cibola and McKinley 
          Counties, New Mexico: U.S. Geological Survey Miscellaneous Field Studies Map 
          MF-1726, scale 1:24,000.
     Mapel, W.J., and Yesberger, W.L., 1985, Geologic map of the Goat Hill quadrangle, 
          Cibola County, New Mexico: U.S. Geological Survey Miscellaneous Field Studies 
          Map MF-1727, scale 1:24,000.
     Mapel, W.J., and Yesberger, W.L., 1985, Geologic map of the Red Lake Mission 
          quadrangle, Cibola County, New Mexico: U.S. Geological Survey Miscellaneous 
          Field Studies Map MF-1758, scale 1:24,000.
     Maxwell, C.H., 1976, Geologic map of the Acoma Pueblo quadrangle, Valencia [now 
          Cibola] County, New Mexico: U.S. Geological Survey Geologic Quadrangle Map 
          GQ-1298, scale 1:24,000.
     Maxwell, C.H., 1976, Geologic Map of the East Mesa quadrangle, Valencia [now Cibola]
          County, New Mexico: U.S. Geological Survey Geologic Quadrangle Map GQ-1522, scale
          1:24,000.
     Maxwell, C.H., 1981, Geologic map of the El Malpais Instant Study Area and adjacent 
          areas, Valencia [now Cibola] County, New Mexico: U.S. Geological Survey 
          Miscellaneous Field Studies Map MF-1375-A, scale 1:62,500.
     McLellan, M.W., Haschke, L.R., and Robinson, L.N., 1982, Geologic map of the Rincon 
          Hondo quadrangle, Cibola County, New Mexico: U.S. Geological Survey Miscellaneous 
          Field Studies Map MF-1506, scale 1:24,000.
     McLellan, M.W., Haschke, L.R., and Robinson, L.N., 1983, Geologic map of the Fence Lake
          quadrangle, Cibola County, New Mexico: U.S. Geological Survey Miscellaneous Field
          Studies Map MF-1533, scale 1:24,000.
     Mytton, J.W., comp., 1983, Geologic map of Chaco Canyon 30 x 60 minute quadrangle, 
          showing coal zones of Fruitland Formation, San Juan, Rio Arriba, and Sandoval
          [and McKinley] Counties, New Mexico: U.S. Geological Survey Coal Investigations
          Map C-92A, scale 1:100,000.
     O'Sullivan, R.B., and Beikman, H.M., comps., 1963, Geology, structure, and uranium 
          deposits of the Shiprock quadrangle, New Mexico and Arizona: U.S. Geological 
          Survey Miscellaneous Geologic Investigations Map 1-345, scale 1:250,000.
     O'Sullivan, R.B., Mytton, J.W., Strobell, J.D., Jr., Scott, G.R., and Erpenbeck, 
          M.F., 1986, Preliminary geologic map of the Tanner Lake quadrangle, San Juan 
          County, New Mexico: U.S. Geological Survey Miscellaneous Field Studies Map 
          MF-1864, scale 1:24,000.
     O'Sullivan, R.B., Scott, R., and Heller, J.S., 1979, Preliminary geologic map of the 
          Hogback South quadrangle, San Juan County, New Mexico: U.S. Geological Survey 
          Miscellaneous Field Studies Map MF-1093, scale 1:24,000.
     O'Sullivan, R.B., Scott, R., and Heller, J.S., 1979, Preliminary geologic map of the
          Kirtland SW quadrangle, San Juan County, New Mexico: U.S. Geological Survey 
          Miscellaneous Field Studies Map MF-1080, scale 1:24,000.
     O'Sullivan, R.B., Scott, G.R., and Weide, D.L., 1979, Preliminary geologic map of 
          the Kin Klizhin Ruins quadrangle, San Juan and McKinley Counties, New Mexico: 
          U.S. Geological Survey Miscellaneous Field Studies Map MF-1094, scale 1:24,000.
     Robertson, J.F., 1986, Geologic map of the Crownpoint quadrangle, McKinley County, New
          Mexico: U.S. Geological Survey Geologic Quadrangle Map GQ-1596, scale 1:24,000.
     Santos, E.S., 1966, Geologic map of the San Lucas Dam quadrangle, McKinley County, New
          Mexico: U.S. Geological Survey Geologic Quadrangle Map GQ-516, scale 1:24,000.
     Santos, E.S., 1966, Geologic map of the San Mateo quadrangle, McKinley and Valencia 
          [now Cibola] Counties, New Mexico: U.S. Geological Survey Geologic Quadrangle Map 
          GQ-517, scale 1:24,000.
     Santos, E.S., and Thaden, R.E., 1966, Geologic map of the Ambrosia Lake quadrangle, 
          McKinley County, New Mexico: U.S. Geological Survey Geologic Quadrangle 
          Map GQ-515, scale 1:24,000.
     Scott, G.R., O'Sullivan, R.B., and Heller, J.S., 1979, Preliminary geologic map of 
          the Burnham Trading Post quadrangle, San Juan County, New Mexico: U.S. Geological
          Survey Miscellaneous Field Studies Map MF-1076, scale 1:24,000.
     Scott, G.R., O'Sullivan, R.B., and Heller, J.S., 1979, Preliminary geologic map of the
          Newcomb NE quadrangle, San Juan County, New Mexico: U.S. Geological Survey 
          Miscellaneous Field Studies Map MF-1092, scale 1:24,000.
     Scott, G.R., O'Sullivan, R.B., and Heller, J.S., 1979, Preliminary geologic map of the
          Pillar NW quadrangle, San Juan County, New Mexico: U.S. Geological Survey 
          Miscellaneous Field Studies Map MF-1077, scale 1:24,000.
     Steven, T.A., Lipman, P.W., Hail, W.J., Jr., Barker, F., and Luedke, R.G., comps., 
          1974, Geologic map of the Durango quadrangle, southwestern Colorado: 
          U.S. Geological Survey Miscellaneous Investigations Series Map I-764, 
          scale 1:250,000.
     Strobell, J.D., Jr., Hayes, P.T., and O'Sullivan, R.B., 1980, Preliminary geologic 
          map of the Waterflow quadrangle, San Juan County, New Mexico: U.S. Geological 
          Survey Miscellaneous Field Studies Map MF-1253, scale 1:24,000.
     Strobell, J.D., Jr., O'Sullivan, R.B., Mytton, J.W., and Erpenbeck, M.F., 1985, 
          Preliminary geologic map of the Pretty Rock quadrangle, San Juan County, New 
          Mexico: U.S. Geological Survey Miscellaneous Field Studies Map MF-1788, 
          scale 1:24,000.
     Tabet, D., 1981, Geology and coal resources, Pinehaven quadrangle, McKinley County, 
          New Mexico: New Mexico Bureau of Mines and Mineral Resources Open-File 
          Report 154, scale 1:24,000.
     Thaden, R.E., 1989, Geologic map of the Fort Defiance quadrangle, Apache County, 
          Arizona, and McKinley County, New Mexico: U.S. Geological Survey Geologic 
          Quadrangle Map GQ-1648, scale 1:24,000.
     Thaden, R.E., 1990, Geologic map of the Buell Park quadrangle, Apache County, Arizona, 
          and McKinley County, New Mexico: U.S. Geological Survey Geologic Quadrangle Map 
          GQ-1649, scale 1:24,000.
     Thaden, R.E., 1990, Geologic map of the Todilto Park quadrangle, McKinley County, New 
          Mexico: U.S. Geological Survey Geologic Quadrangle Map GQ-1646, scale 1:24,000.
     Thaden, R.E., 1990, Geologic map of the Window Rock quadrangle, Apache County, Arizona,
          and McKinley County, New Mexico: U.S. Geological Survey Geologic Quadrangle Map 
          GQ-1647, scale 1:24,000.
     Thaden, R.E., Santos, E.S., and Ostling, E.J., 1966, Geologic map of the Goat Mountain
          quadrangle, McKinley County, New Mexico: U.S. Geological Survey Geologic 
          Quadrangle Map GQ-518, scale 1:24,000.
     Thaden, R.E., and Zech, R.S., unpublished geologic and photogeologic mapping, scale
          1:500,000.
     Weide, D.L., O'Sullivan, R.B., and Heller, J.S., 1979, Preliminary geologic map of
          the Fruitland quadrangle, San Juan County, New Mexico: U.S. Geological Survey 
          Miscellaneous Field Studies Map MF-1089, scale 1:24,000.
     Weide, D.L., Schneider, G.B., Mytton, J.W., and Scott, G.R., 1979, Geologic map of 
          the Pueblo Bonito quadrangle, San Juan [and McKinley] County, New Mexico: U.S. 
          Geological Survey Miscellaneous Field Studies Map MF-1119, scale 1:24,000.
     Wilson, E.D., Moore, R.T., and Cooper, J.R., comps., 1969, Geological map of 
          Arizona: U.S. Geological Survey Special Geologic Map, scale 1:500,000. 
          (Reprinted 1977).
     Wyant, D.J.G. and Olson, A., comps., 1978, Geologic map of the Albuquerque 1x2 
          degree quadrangle, northwestern New Mexico: U.S. Geological Survey Open-File 
          Report 78-467, scale 1:250,000.