Geology and geochemistry of volcanic centers within the eastern half of the Sonoma volcanic field, northern San Francisco Bay region, California

Geosphere

Volumn 7, Issue 3, 2011, Pages 629-657

  Sweetkind, Donald S ^a   Rytuba, James J ^b   Langenheim, Victoria E ^b   Fleck, Robert J ^b  

^a DENVER FEDERAL CENTER   (United States)

^b U S GEOLOGICAL SURVEY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

FAULT ZONE; GEOCHEMISTRY; LAVA; MAPPING; TUFF; VOLCANIC ERUPTION; VOLCANIC ROCK; VOLCANISM; VOLCANOLOGY;

CALIFORNIA; SAN FRANCISCO BAY; SONOMA COUNTY; UNITED STATES;

EID: 80054759082     PISSN: 1553-040     EISSN: 1553040X     Source Type: Journal    
DOI: 10.1130/GES00625.1     Document Type: Article

References (88)

1. Atwater, T., and Stock, J., 1998, Pacific-North America plate tectonics of the Negoene southwestern United States: An update, in Ernst, W.G., and Nelson, C.A., eds., Integrated Earth and Environmental Evolution of the Southwestern United States: The Clarence A. Hall, Jr. Volume: Bellwether Publishing, Ltd. for Geological Society of America, p. 393-420.
2. Bellon, H., Aguillón-Robles, A., Calmus, T., Maury, R.C., Bourgois, J., and Cotten, J., 2006, La Purísima volcanic field, Baja California Sur (Mexico): Miocene to Quaternary volcanism related to subduction and opening of an asthenospheric window: Journal of Volcanology and Geothermal Research, v. 152, p. 253-272, doi: 10.1016/j.jvolgeores.2005.10.005.
3. Benoit, M., Aguillón-Robles, A., Calmus, T., Maury, R.C., Bellon, H., Cotton, J., Bourgois, J., and Michaud, F., 2002, Geochemical diversity of late Miocene volcanism in southern Baja California, Mexico; implication of mantle and crustal sources during the opening of an asthenospheric window: The Journal of Geology, v. 110, p. 627-648, doi: 10.1086/342735.
4. Bezore. S.P., Clahan, K.B., Sowers, J.M., and Witter, R.C., 2005, Geologic map of the Yountville 7.5′ quadrangle, Napa County, California: A digital database: California Geological Survey Preliminary Geologic Map, scale 1:24,000, http://www.conservation.ca.gov/cgs/rghm/rgm/preliminary_geologic_maps.htm.
5. Bezore. S.P., Sowers, J.M., and Witter, R.C., 2004, Geologic map of the Mt. George 7.5′ quadrangle, Napa and Solano Counties, California: A digital database: California Geological Survey Preliminary Geologic Map, scale 1:24,000, http://www.conservation.ca.gov/cgs/rghm/rgm/preliminary_geologic_maps.htm.
6. Blake, M.C., Jr., Graymer, R.W., and Stamski, R.E., 2002, Geologic map and map database of western Sonoma, northernmost Marin, and southernmost Mendocino Counties, California: U.S. Geological Survey Miscellaneous Field Studies Map MF-2402, 42 p., scale 1:100,000.
7. Briggs, P.H., 2002, Chapter G-The determination of forty elements in geological and botanical samples by inductively coupled plasma-atomic emission spectrometry, in Taggart, J.E., Jr., ed., Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey Open-File Report 02-0223, 20 p.
8. Bryant, W.A. (compiler), 2005, Digital database of Quaternary and younger faults from the fault activity map of California, version 2.0: California Geological Survey Web Page, http://www.consrv.ca.gov/CGS/information/publications/QuaternaryFaults_ver2.htm (August, 2008).
9. Cameron, B.I., Walker, J.A., Carr, M.J., Patino, L.C., Matías, O., and Feigenson, M.D., 2003, Flux versus decompression melting at stratovolcanoes in southeastern Guatemala: Journal of Volcanology and Geothermal Research, v. 119, p. 21-50, doi: 10.1016/S0377-0273(02)00304-9.
10. Chesterman, C.W., 1956, Pumice, pumicite and volcanic cinders of California: California Division of Mines Bulletin 174, 119 p.
11. Clahan, K.B., Wagner, D.L., Bezore, S.P., Sowers, J.M., and Witter, R.C., 2005, Preliminary geologic map of the Rutherford 7.5′ Quadrangle: A digital database: California Geological Survey Preliminary Geologic Map, scale 1:24,000, http://www.conservation.ca.gov/cgs/rghm/rgm/preliminary_geologic_maps.htm.
12. Clahan, K.B., Wagner, D.L., Saucedo, G.J., Randolph-Loar, C.E., and Sowers, J.M., 2004, Geologic Map of the Napa 7.5′ Quadrangle Napa County, California: A Digital Database: California Geological Survey PreliminaryGeologic Map, scale 1:24,000, http://www.conservation.ca.gov/cgs/rghm/rgm/preliminary_geologic_maps.htm.
13. Clark, B.L., 1912, The Neocene section at Kirker Pass on the north side of Mount Diablo: University of California: Bulletin of the Department of Geological Sciences, v. 7, p. 47-60.
14. Cole, R.B., and Basu, A.R., 1995, Nd-Sr geochemistry and tectonics of ridge subduction and middle Cenozoic volcanism in western California: Geological Society of America Bulletin, v. 107, p. 167-179, doi: 10.1130/0016-7606(1995)107<0167:NSIGAT>2.3.CO;2.
15. Cousens, B., Prytulak, J., Henry, C., Alcazar, A., and Brownrigg, T., 2008, Geology, geochronology, and geochemistry of the Miocene-Pliocene Ancestral Cascades arc, northern Sierra Nevada, California and Nevada-The roles of the upper mantle, subducting slab, and the Sierra Nevada lithosphere: Geosphere, v. 4, p. 829-853, doi: 10.1130/GES00166.1.
16. Defant, M.J., and Drummond, M.S., 1990, Derivation of some modern arc magmas by melting of young subducted lithosphere: Nature, v. 347, p. 662-665, doi:10.1038/347662a0.
17. Delattre, M.P., Wagner, D.L., Higgins, C.T., Witter, R.C., and Sowers, J.M., 2007, Geologic Map of the Kenwood 7.5′ Quadrangle Sonoma and Napa Counties, California: A Digital Database: California Geological Survey Preliminary Geologic Map, scale 1:24,000, http://www.conservation.ca.gov/cgs/rghm/rgm/preliminary_geologic_maps.htm.
18. Dickinson, W.R., 1997, Tectonic implications of Cenozoic volcanism in coastal California: Geological Society of America Bulletin, v. 109, p. 936-954, doi: 10.1130/0016-7606(1997)109<0936:OTIOCV>2.3.CO;2.
19. Dickinson, W.R., and Snyder, W.S., 1979, Geometry of subducted slabs related to the San Andreas transform: The Journal of Geology, v. 87, p. 609-627, doi:10.1086/628456.
20. Donnelly-Nolan, J.M., Hearn, B.C., Jr., Curtis, G.H., and Drake, R.E., 1981, Geochronology and evolution of the Clear Lake Volcanics, in McLaughlin, R.J., and Donnelly-Nolan, J.M., eds., Research in the Geysers-Clear Lake Geothermal Area, Northern California: U. S. Geological Survey Professional Paper 1141, p. 47-60.
21. Duffield, W.A., and Dalrymple, G.B., 1990, The Taylor Creek Rhyolite of New Mexico-A rapidly emplaced field of lava domes and flows: Bulletin of Volcanology, v. 52, p. 475-487, doi: 10.1007/BF00268927.
22. Fox, K.F., Jr., 1983, Tectonic setting of late Miocene, Pliocene, and Pleistocene rocks in part of the Coast Ranges north of San Francisco, California: U.S. Geological Survey Professional Paper 1239, 33 p.
23. Fox, K.F., Jr., Sims, J.D., Bartow, J.A., and Helley, E.J., 1973, Preliminary geologic map of eastern Sonoma County and western Napa County, California: U.S. Geological Survey Miscellaneous Field Studies Map MF-483, 4 sheets, scale 1:62,500.
24. Fox, K.F., Jr., Fleck, R.J., Curtis, G.H., and Meyer, C.E., 1985a, Implications of the northwestwardly younger age of the volcanic rocks of west central California: Geological Society of America Bulletin, v. 96, p. 647-654, doi:10.1130/0016-7606(1985)96<647:IOTNYA>2.0.CO;2.
25. Fox, K.F., Jr., Fleck, R.J., Curtis, G.H., and Meyer, C.E., 1985b, Potassium-argon and fission track ages of the Sonoma Volcanics in an area north of San Pablo Bay, California: U.S. Geological Survey Miscellaneous Field Studies Map MF-1753, scale 1:125,000, 1 sheet, 9 p.
26. Furlong, K.P., 1984, Lithospheric behavior with triple junction migration, an example based on the Mendocino triple junction: Physics of the Earth and Planetary Interiors, v. 36, p. 213-223, doi: 10.1016/0031-9201(84)90047-5.
27. Furlong, K.P., and Schwartz, S.Y., 2004, Influence of the Mendocino Triple Junction on the tectonics of Coastal California: Annual Review of Earth and Planetary Sciences, v. 32, p. 403-433, doi: 10.1146/annurev.earth.32.101802.120252.
28. Gorring, M.L., and Kay, S.M., 2001, Mantle processes and source of Neogene slab window magmas from southern Patagonia, Argentina: Journal of Petrology, v. 42, p. 1067-1094, doi: 10.1093/petrology/42.6.1067.
29. Graymer, R.W., Jones, D.L., and Brabb, E.E., 2002a, Geologic map and map database of northeastern San Francisco Bay region, California: U.S. Geological Survey Miscellaneous Field Studies Map MF-2403, scale 1:100,000, 28 p., http://pubs.usgs.gov/mf/2002/2403.
30. Graymer, R.W., Sarna-Wojcicki, A.M., Walker, J.P., McLaughlin, R.J., and Fleck, R.J., 2002b, Controls on timing and amount of right-lateral offset on the East Bay fault system, San Francisco Bay region, California: Geological Society of America Bulletin, v. 114, p. 1471-1479, doi: 10.1130/0016-7606(2002)114<1471:COTAAO>2.0.CO;2.
31. Graymer, R.W., Moring, B.C., Saucedo, G.J., Wentworth, C.M., Brabb, E.E., and Knudsen, K.L., 2006a, Geologic map of the San Francisco Bay region: U.S. Geological Survey Scientific Investigations Map 2918, scale 1:275,000, http://pubs.usgs.gov/sim/2006/2918.
32. Graymer, R.W., Bryant, W., McCabe, C.A., Hecker, S., and Prentice, C.S., 2006b, Map of Quaternary-active faults in the San Francisco Bay region: U.S. Geological Survey Scientific Investigations Map 2919, http://pubs.usgs.gov/sim/2006/2919.
33. Graymer, R.W., Brabb, E.E., Jones, D.J., Barnes, J., Nicholson, R.S., and Stamski, R.E., 2007, Geologic map and map database of eastern Sonoma and western Napa counties, California: U.S. Geological Survey Scientific Investigations Map 2956, scale 1:100,000, 30 p., http://pubs.usgs.gov/sim/2007/2956/.
34. Groome, W.G., and Thorkelson, D.J., 2009, The threedimensionalthermo-mechanical signature of ridge subduction and slab window migration: Tectonophysics, v. 464, p. 70-83, doi: 10.1016/j.tecto.2008.07.003.
35. Hammersley, L., and DePaolo, D.J., 2006, Isotopic and geophysical constraints on the structure and evolution of the Clear Lake volcanic system: Journal of Volcanology and Geothermal Research, v. 153, p. 331-356, doi:10.1016/j.jvolgeores.2005.12.003.
36. Hausback, B.P., and Nilsen, T.H., 1999, Sutter Buttes, in Wagner, D.L., and Graham, S.A., eds., Geologic Field Trips in northern California: Centennial Meeting of the Cordilleran Section of the Geological Society of America, Special Publication 119, California Division of Mines and Geology, p. 246-254.
37. Hole, M.J., 1988, Post-subduction alkaline volcanism along the Antarctic Peninsula: Journal of the Geological Society, v. 145, p. 985-988, doi: 10.1144/gsjgs.145.6.0985.
38. Hole, M.J., 1990, Geochemical evolution of Pliocene-Recent post-subduction alkalic basalts from Seal Nunataks, Antarctic Peninsula: Journal of Volcanology and Geothermal Research, v. 40, p. 149-167, doi:10.1016/0377-0273(90)90118-Y.
39. Howell, D.G., and Swinchatt, J.P., 2003, Mega-landslides in Napa Valley, California: Geological Society of America Abstracts with Programs, v. 35, no. 6, p. A96.
40. Jachens, R.C., and Moring, B.C., 1990, Maps of thickness of Cenozoic deposits and the isostatic residual gravity over basement for Nevada: U.S. Geological Survey Open-File Report 90-404, scale 1:1,000,000, 2 sheets, 15 p.
41. Johnson, C.M., and O'Neil, J.R., 1984, Triple junction magmatism: A geochemical study of Neogene volcanic rocks in western California: Earth and Planetary Science Letters, v. 71, p. 241-262, doi: 10.1016/0012-821X(84)90090-6.
42. Johnston, S.T., and Thorkelson, D.J., 1997, Cocos-Nazca slab window beneath Central America: Earth and Planetary Science Letters, v. 146, p. 465-474, doi: 10.1016/S0012-821X(96)00242-7.
43. Kunkel, F., and Upson, J.E., 1960, Geology and ground water in Napa and Sonoma Valleys, Napa and Sonoma Counties, California: U.S. Geological Water-Supply Paper 1495, 252 p.
44. Lachenbruch, A.H., and Sass, J.H., 1980, Heat flow and energetics of the San Andreas fault zone: Journal of Geophysical Research, v. 85, p. 6185-6222, doi: 10.1029/JB085iB11p06185.
45. Langenheim, V.E., Roberts, C.W., McCabe, C.A., McPhee, D.K., Tilden, J.E., and Jachens, R.C., 2006, Preliminary isostatic gravity map of the Sonoma volcanic field and vicinity, Sonoma and Napa Counties, California: U.S. Geological Survey Open-File Report 2006-1056, scale 1:100,000, 1 sheet, http://pubs.usgs.gov/of/2006/1056/.
46. Langenheim, V.E., Graymer, R.C., Jachens, R.C., McLaughlin, R.J., Wagner, D.L., and Sweetkind, D.S., 2010, Geophysical framework of the northern San Francisco Bay region, northern California: Geosphere, v. 6, p. 594-620, doi: 10.1130/GES00510.1.
47. Lawson, A.C., 1914, Description of the San Francisco district-Tamalpais, San Francisco, Concord, San Mateo, and Hayward quadrangles: U.S. Geological Survey Geological Atlas, Folio 193, 25 p.
48. LeBas, M.J., LeMaitre, R.W., Streckeisen, A., and Zanettin, B., 1986, A chemical classification of volcanic rocks based on the total alkali silica diagram: Journal of Petrology, v. 27, p. 745-750.
49. Le Maitre, R.W., 2002, Igneous Rocks: A classification and glossary of terms: Recommendations of the International Union of Geological Sciences Subcommission on the Systematics of Igneous Rocks: Cambridge, Cambridge University Press, 236 p.
50. Liu, M., and Furlong, K.P., 1992, Cenozoic volcanism in California Coast Ranges-Numerical solutions: Journal of Geophysical Research, v. 97, p. 4941-4951, doi:10.1029/92JB00193.
51. Ludington, S., Moring, B.C., Miller, R.J., Stone, P.A., Bookstrom, A.A., Bedford, D.R., Evans, J.G., Haxel, G.A., Nutt, C.J., Flyn, K.S., and Hopkins, M.J., 2006, Preliminary integrated geologic map databases for the United States, western states: California, Nevada, Arizona, Washington, Oregon, Idaho, and Utah, version 1.2: U.S. Geological Survey Open-File Report 2005-1305, http://pubs.usgs.gov/of/2005/1305/.
52. Luedke, R.G., and Smith, R.L., 1981, Map showing distribution, composition, and age of Late Cenozoic volcanic centers in Oregon and Washington: U.S. Geological Survey Miscellaneous Investigations Series Map I-1091-D, scale 1:1,000,000.
53. Luhr, J.F., Aranda-Gomez, J.J., and Housh, T.B., 1995, San Quintin Volcanic Field, Baja California Norte, Mexico: Geology, petrology, and geochemistry: Journal of Geophysical Research, v. 100, p. 10,353-10,380, doi:10.1029/95JB00037.
54. Macdonald, G.A., and Katsura, T., 1964, Chemical composition of Hawaiian lavas: Journal of Petrology, v. 5, p. 82-133.
55. Mankinen, E.A., 1972, Paleomagnetism and potassium-argon ages of the Sonoma Volcanics, California: Geological Society of America Bulletin, v. 83, p. 2063-2072, doi:10.1130/0016-7606(1972)83[2063:PAPAOT]2.0.CO;2.
56. Martin, H., Smithies, R.H., Rapp, R.P., Moyen, J.F., and Champion, D.C., 2005, An overview of adakite, tonalite-trondhjemite-granodiorite (TTG) and sanukitoid-Relationships and some implications for crustal evolution: Lithos, v. 79, p. 1-24, doi: 10.1016/j.lithos.2004.04.048.
57. McCrory, P.A., Wilson, D.S., and Stanley, R.G., 2009, Continuing evolution of the Pacific-Juan de Fuca-North America slab window system-A trench-ridge-transform example from the Pacific Rim: Tectonophysics, v. 464, p. 30-42, doi: 10.1016/j.tecto.2008.01.018.
58. McLaughlin, R.J., and Sarna-Wojcicki, A.M., 2003, Geology of the right stepover region between the Rodgers Creek, Healdsburg, and Maacama Faults, Northern San Francisco Bay Region-A Contribution to Northern California Geological Society Field Trip Guide, June 6-8, 2003: U.S. Geological Survey Open-File Report 03-502, 23 p., http://geopubs.wr.usgs.gov/open-file/of03-502/.
59. McLaughlin, R.J., Sliter, W.V., Sorg, D.H., and Russell, P.C., 1996, Large-scale right-slip displacement on the east San Francisco Bay Region fault system, California-Implications for location of late Miocene to Pliocene Pacific Plate boundary: Tectonics, v. 15, p. 1-18, doi:10.1029/95TC02347.
60. McLaughlin, R.J., Sarna-Wojcicki, A.M., Fleck, R.J., Wright, W.H., Levin, V.R.G., and Valin, Z.C., 2004, Geology, tephrochronology, radiometric ages, and cross sections of the Mark West Springs 7.5′ quadrangle, Sonoma and Napa Counties, California: U.S. Geological Survey Scientific Investigations Map 2858, scale 1:24,000, 16 p., http://pubs.usgs.gov/sim/2004/2858/.
61. McLaughlin, R.J., Sarna-Wojcicki, A.M., Fleck, R.J., Langenheim, V.E., and Jachens, R.C., 2005, Framework geology and structure of the Sonoma Volcanics and associated sedimentary deposits, of the right-stepped Rodgers Creek-Maacama fault system and concealed basins beneath Santa Rosa plain, in Stevens, C., and Cooper, J., eds., Late Neogene transition from transform to subduction margin east of the San Andreas fault in the wine country of the northern San Francisco Bay Area, California, Fieldtrip 10: Pacific Section, SEPM (Society for Sedimentary Geology) Book 98, p. 29-81.
62. McLaughlin, R.J., Langenheim, V.E., Sarna-Wojcicki, A.M., Fleck, R.J., McPhee, D.K., McCabe, C.A., and Wan, E., 2008, Geologic and geophysical framework of the Santa Rosa 7.5′ quadrangle, Sonoma County, California: U.S. Geological Survey Open-File Report 2008-1009, scale 1:24,000, 55 p., http://pubs.usgs.gov/of/2008/1009/.
63. McQuarrie, N., and Wernicke, B.P., 2005, An animated tectonic reconstruction of southwestern North America since 36 MA: Geosphere, v. 1, p. 147-172, doi:10.1130/GES00016.1.
64. Peccerillo, A., and Taylor, S.R., 1976, Geochemistry of Eocene calc-alkaline volcanic rocks from the Kastamonu area, Northern Turkey: Contributions to Mineralogy and Petrology, v. 58, p. 63-81, doi: 10.1007/BF00384745.
65. Phillips, J.D., 2001, Designing matched bandpass and azimuthal filters for the separation of potential-field anomalies by source region and source type, 15th Geophysical Conference and Exhibition: Brisbane, Australia, Australian Society of Exploration Geophysicists, Expanded Abstracts CD-ROM, 4 p.
66. Sarna-Wojcicki, A.M., 1976, Correlation of late Cenozoic tuffs in the central Coast Ranges of California by means of trace-and minor-element chemistry: U.S. Geological Survey Professional Paper 972, 32 p.
67. Sarna-Wojcicki, A.M., Bowman, H.R., and Russell, P.C., 1979, Chemical correlation of some late Cenozoic tuffs of northern and central California by neutron activation analysis of glass and comparison with X-ray fluorescence analysis: U.S. Geological Survey Professional Paper 1147, 15 p.
68. Sarna-Wojcicki, A.M., Bowman, H.R., Meyer, C.E., Russell, P.C., Woodward, M.J., McCoy, G., Rowe, J.J., Jr., Baedecker, P.A., Asaro, F., and Michael, H., 1984, Chemical analyses, correlations, and ages of upper Pliocene and Pleistocene ash layers of east-central and southern California: U.S. Geological Survey Professional Paper 1293, 40 p.
69. Sarna-Wojcicki, A.M., Deino, A.L., Fleck, R.J., McLaughlin, R.J., Wagner, D., Wan, E., Wahl, D., and Perkins, M., 2011, Age, composition, and areal distribution of the lower Pliocene Lawlor Tuff and three overlying tuffs, California and Nevada: Geosphere, doi: 10.1130/GES00609.1.
70. Saucedo, G.J., Bedford, D.R., Raines, G.L., Miller, R.J., and Wentworth, C.M., 2002, GIS data for the geologic map of California: Sacramento, California, California Geological Survey, CD 2000-07.
71. Schmidt, M.E., Grunder, A.L., and Rowe, M.C., 2008, Segmentation of the Cascades Arc as indicated by Sr and Nd isotopic variation among diverse primitive basalts: Earth and Planetary Science Letters, v. 266, p. 166-181, doi: 10.1016/j.epsl.2007.11.013.
72. Schmitt, A.K., Grove, M., Harrison, T.M., Lovera, O., Hulen, J., and Walters, M., 2003a, The Geysers-Cobb Mountain Magma system, California (Part 1): U-Pb zircon ages of volcanic rocks, conditions of zircon crystallization and magma residence times: Geochimica et Cosmochimica Acta, v. 67, p. 3423-3442, doi:10.1016/S0016-7037(03)00140-6.
73. Schmitt, A.K., Grove, M., Harrison, T.M., Lovera, O., Hulen, J., and Walters, M., 2003b, The Geysers-Cobb Mountain Magma system, California (Part 2): Time scales of pluton emplacement and implications for its thermal history: Geochimica et Cosmochimica Acta, v. 67, p. 3443-3458, doi: 10.1016/S0016-7037(03)00126-1.
74. Schmitt, A.K., Romer, R.L., and Stimac, J.A., 2006, Geochemistry of volcanic rocks from the Geysers geothermal area, California Coast Ranges: Lithos, v. 87, p. 80-103, doi: 10.1016/j.lithos.2005.05.005.
75. Sun, S.S., and McDonough, W.F., 1989, Chemical and isotopic systematics of oceanic basalts: Implications for mantle composition and processes, in Saunders, A.D., and Norry, M.J., eds., Magmatism in the ocean basins: Geological Society [London] Special Publication 42, p. 313-345.
76. Sweetkind, D.S., Rytuba, J.J., Langenheim, V.E., Sarna-Wojcicki, A.M., and Alan Deino, 2005, Day 3-Franz Valley, Petrified Forest, Napa Valley, in Stevens, C., and Cooper, J., eds., Late Neogene transition from transform to subduction margin east of the San Andreas fault in the wine country of the northern San Francisco Bay Area, California, Fieldtrip 10: Pacific Section, SEPM (Society for Sedimentary Geology) Book 98, p. 82-112.
77. Taggart, J.E., Jr., and Siems, D.F., 2002, Chapter T-Major element analysis by wavelength dispersive X-ray fluorescence spectrometry, in Taggart, J.E., Jr., ed., Analytical methods for chemical analysis of geologic and other materials: U.S. Geological Survey Open-File Report 02-0223, 9 p.
78. Thorkelson, D.J., 1996, Subduction of diverging plates and the principles of slab window formation: Tectonophysics, v. 255, p. 47-63, doi: 10.1016/0040-1951(95)00106-9.
79. Vitt, A.W., 1936, The Pinole Tuff east of San Francisco Bay [M.A. thesis]: Berkeley, University of California, 70 p.
80. Wagner, D.L., Randolph-Loar, C.E., Witter, R.C., and Huffman, M.E., 2003, Preliminary geologic map of the Glen Ellen 7.5′ Quadrangle: A digital database: California Geological Survey Preliminary Geologic Map, scale 1:24,000, http://www.conservation.ca.gov/cgs/rghm/rgm/preliminary_geologic_maps.htm.
81. Wagner, D.L., Clahan, K.B., Randolph-Loar, C.E., and Sowers, J.M., 2004, Preliminary geologic map of the Sonoma 7.5′ Quadrangle: A digital database: California Geological Survey Preliminary Geologic Map, scale 1:24,000, http://www.conservation.ca.gov/cgs/rghm/rgm/preliminary_geologic_maps.htm.
82. Wagner, D.L., Gutierrez, C.I., and Clahan, K.B., 2006, Geologic Map of the South Half Napa 30′ × 60′ Quadrangle, California: California Geological Survey Preliminary Geologic Map, scale 1:100,000, http://www.conservation.ca.gov/cgs/rghm/rgm/preliminary_geologic_maps.htm.
83. Wagner, D.L., Fleck, R.J., Langenheim, V.E., McLaughlin, R.J., Sarna-Wojcicki, A.M., and Allen, J.R., 2011, Volcanic, sedimentary and tectonic evolution of the southern Sonoma Volcanics and related rocks, northern San Francisco Bay region, California: Geosphere, doi:10.1130/GES00626.1.
84. Wakabayashi, J., 1999, Distribution of displacement on, and evolution of, a young transform fault system: The northern San Andreas fault system, California: Tectonics, v. 18, p. 1245-1274, doi: 10.1029/1999TC900049.
85. Weaver, C.E., 1949, Geology of the Coast Ranges immediately north of the San Francisco Bay region, California: Geological Society of America Memoir 35, 242 p.
86. Weiss, S.I., and Livermore, J.S., 1996, Multiple late Pliocene volcanic, hydrothermal, and mineralization events in the Sonoma Volcanic Field near Calistoga, California: Geological Society of America Abstracts with Programs: Cordilleran Section, v. 28, p. 122.
87. Whitlock, J.S., 2002, Evidence of a mantle wedge source for Slab Window volcanism in the northern California Coast Ranges [M.S. thesis]: University Park, Pennsylvania State University, 78 p.
88. Wilson, D.S., McCrory, P.A., and Stanley, R.G., 2005, Implications of volcanism in coastal California for the Neogene deformation history of western North America: Tectonics, v. 24, p. TC3008, doi: 10:1029/2003TC001621.