Dr. Charles Bacon is a Research Geologist at the U.S. Geological Survey in the Volcano Hazards Team who has done a tremendous amount of work on Crater Lake National Park's geology.

He earned his BS in Geology at Stanford in 1970 and his Ph.D. in Geology from Univ. of California, Berkeley in 1975. His current research interests include Physical volcanology, petrology, geochemistry, and eruptive histories of calderas, emphasizing detailed study of Crater Lake, Oregon, and Veniaminof and Aniakchak calderas, Alaska Peninsula. General interest in volcanic and magmatic processes. Secondary Ion Mass Spectrometry applied to geologic and biologic materials: http://shrimprg.stanford.edu/Personnel.htm

 Related Links

 Bibliography (Partial)

• George, R., Turner, S., Hawkesworth, C., Bacon, C. R., Nye, C., Stelling, P., and Dreher, S., 2003?, Chemical versus temporal controls on the evolution of tholeiitic and calc-alkaline magmas at two volcanoes in the Alaska-Aleutian arc:  accepted by Journal of Petrology (July 2003).

• Weber, P.K., Bacon, C.R., Hutcheon, I.D., Ingram, B.L., and Wooden, J.L., 2003?, Ion microprobe measurement of strontium isotopes in salmon otoliths to construct high temporal resolution migration histories.  submitted to Geochimica et Cosmochimica Acta.

• Meibom, A., Morten, S., Wooden, J., Constanz, B. R., Dunbar, R. B., Owen, A., Grumet, N., Bacon, C. R., and Chamberlain, C. P., 2003, Monthly  strontium/calcium oscillations in symbiotic coral aragonite: biological effects limiting the precision of the paleotemperature proxy:  Geophysical Research Letters, v. 30, no. 7, 10.1029/2002GL016864.

• Bacon, C. R., Weber, P. K., Larsen, K. A., Reisenbichler, R., Fitzpatrick, J. A., and Wooden, J. L., 2004?, Migration and rearing histories of chinook salmon (Oncorhynchus tshawytscha) determined by ion microprobe Sr isotope and Sr/Ca transects of otoliths: submitted to Canadian Journal of Fisheries and Aquatic Sciences.

• Bacon, C R., 2004?, Geologic map of Mount Mazama and Crater Lake caldera, Oregon:  U.S. Geological Survey Miscellaneous Investigations Series Map I-?, 3 plates, 2 figures, 125 text pages (to USGS Western Publications Group 9/11/02).

• Klimasauskas, Ed, Bacon, Charles, and Alexander, Jim, 2002, Mount Mazama and Crater Lake: Growth and destruction of a Cascade volcano:  U.S. Geological Survey Fact Sheet 092-02, 4 p.

• Bacon, C. R., Gardner, J. V., Mayer, L. A., Buktenica, M. W., Dartnell, P., Ramsey, D. W., and Robinson, J. E., 2002, Morphology, volcanism, and mass wasting in Crater Lake, Oregon: Geological Society of America Bulletin, v. 114, p. 675-692.

• Bacon, C R., 2002, Citation for Alfred T. Anderson, Jr., for the 2001 Bowen Award:  EOS, Transactions American Geophysical Union, v. 83, no. 10, p. 107-108.

• Klug, C., Cashman, K. V., and Bacon, C. R., 2002, Structure and physical characteristics of pumice from the climactic eruption of Mount Mazama (Crater Lake), Oregon:  Bulletin of Volcanology, v. 64, p. 486-501.

• Ramsey, D.W., Robinson, J.E., Dartnell, Peter, Bacon, C.R., Gardner, J.V., Mayer, L.A., Buktenica, M.W., and Nathenson, M., 2002, Crater Lake revealed:  Using GIS to visualize and analyze the depths of Crater Lake, Oregon:  ESRI Map Book,  v. 17, p. 9.

• Gardner, J.V., Dartnell, P., Hellequin, L., Bacon, C.R., Mayer, L.A., Buktenica, M.W., and Stone, J.C., 2001, Bathymetry and selected perspective views of Crater Lake, Oregon:  U.S. Geological Survey, Water Resources Investigations Report 01-4046, 2 sheets.

• Bacon, C.R., Persing, H.M., Wooden, J.L., and Ireland, T.R., 2000, Late Pleistocene granodiorite beneath Crater Lake caldera, Oregon, dated by ion microprobe:  Geology, v. 28, p. 467-470.

• Manley, C.R., and Bacon, C.R., 2000, Rhyolite themobarometry and the shallowing of the magma reservoir, Coso volcanic field, California: Journal of Petrology, v. 41, p. 149-174.

• Bacon, C.R., 2000, (Acceptance of 1999 Bowen Award of the Volcanology, Geochemistry, and Petrology Section of the American Geophysical Union):  EOS, Transactions American Geophysical Union, v. 81, no. 15, p. 160 & 164.

• Sisson, T.W., and Bacon, C.R., 1999, Gas-driven filter pressing in magmas: Geology, v. 27, p. 613-616

• Guffanti, M.C., Bacon, C.R., Hanks, T.C., and Scott, W.E., eds. , 1999, Proceedings of the workshop on present and future directions in volcano-hazard assessments, Menlo Park, September 23-24, 1998:  U.S. Geological Open-File Report 99-339, 33 p.

• Bacon, C. R., Lanphere, M.A., and Champion, D.E., 1999, Late Quaternary slip rate and seismic hazards on the west Klamath Lake fault zone near Crater Lake, Oregon:  Geology, v. 27, p. 43-46.

• Bacon, C.R., Mastin, L.G., Scott, K.M., and Nathenson, Manuel, 1997, Volcano and earthquake hazards in the Crater Lake region, Oregon.  U.S. Geological Survey Open-File Report 97-487, 32 p, 1 plate.

• Bacon, C.R., and Nathenson, Manuel, 1996, Geothermal resources in the Crater Lake area, Oregon:  U.S. Geological Survey Open-File Report 96-663, 34 p.

• Nelson, C.H., and Bacon, C.R., 1995, Crater Lake National Park: Presently Tranquil.  U.S. Geological Survey Fact Sheet, 2 p.

• Bacon, C.R., Bruggman, P.E., Christiansen, R.L., Clynne, M.A., Donnelly-Nolan, J.M., and Hildreth, Wes, 1997, Primitive magmas at five Cascade volcanic fields:  Melts from hot, heterogeneous sub-arc mantle:  in Nixon, G.T., Johnston, A.D., and Martin, R.F., editors, Nature and Origin of Primitive Magmas at Subduction Zones:  Canadian Mineralogist, v. 35, p. 397-423.

• Bacon, C.R., and Lanphere, M.A., 1996, Late Cretaceous age of the Middle Fork caldera, Eagle quadrangle, east-central Alaska:  in Moore, T.E., and Dumoulin, J.A., editors, Geologic Studies in Alaska by the U.S. Geological Survey, 1994: U.S. Geological Survey Bulletin 2152, p. 143 147.

• Lowenstern, J.B., Bacon, C.R., Calk, L.C., Hervig, R.L., and Aines, R.D., 1994, Major-element, trace-element, and volatile concentrations in silicate melt inclusions from the tuff of Pine Grove, Wah Wah Mountains, Utah:  U.S. Geological Survey Open-File Report 94-242, 20 p.

• Bacon, C.R., Gunn, S.H., Lanphere, M.A., and Wooden, J.L., 1994, Multiple isotopic components in Quaternary volcanic rocks of the Cascade arc near Crater Lake, Oregon:  Journal of Petrology, v. 35, p. 1521-1556.

• Bruggman, P.E., Bacon, C.R., Mee, J.S., Pribble, S.T., and Siems, D.F., 1993, Chemical analyses of pre-Mazama silicic volcanic rocks, inclusions, and glass separates, Crater Lake, Oregon:  U.S. Geological Survey Open-file Report 93-314, 20 p.

• Nelson, C.H., Bacon, C.R., Robinson, S.W., Adam, D.P., Bradbury, J.P., Barber, J.H., Jr., Schwartz, D., and Vagenas, G., 1994, The volcanic, sedimentologic and paleolimnologic history of the Crater Lake caldera floor, Oregon:  Evidence for small caldera evolution:  Geological Society of America Bulletin, v. 106, p. 684-704.

• Nakada, S., Bacon, C.R., and Gartner, A.E., 1994, Origin of phenocrysts and compositional deiversity in pre-Mazama rhyodacite lavas, Crater Lake, Oregon:  Journal of Petrology, v. 35, p. 127-162.

• Suzuki-Kamata, K., Kamata, H., and Bacon, C.R., 1993, Evolution of the caldera-forming eruption at Crater Lake, Oregon, indicated by component analysis of lithic fragments:  Journal of Geophysical Research, v. 98, p. 14,059-14,074.

• Kamata, H., Suzuki-Kamata, K., and Bacon, C.R., 1993, Deformation of the Wineglass Welded Tuff and the timing of caldera collapse at Crater Lake, Oregon:  Journal of Volcanology and Geothermal Research, v. 56, p. 253-265.

• Bacon, C.R., 1992, Partially melted granodiorite and related rocks ejected from Crater Lake caldera, Oregon:  Transactions of the Royal Society of Edinburgh: Earth Sciences (Hutton Symposium on Granite and Related Rocks), v. 83, p. 27-47.  Also in Brown, P.E., and Chappell, B. W., eds., 1992, The Second Hutton Symposium on the origin of granites and related rocks:  Geological Society of America Special Paper 272, p. 27-47.

• Bacon, C. R., Newman, S., and Stolper, E., 1992, Water CO2, Cl, and F in melt inclusions in phenocrysts from three Holocene eruptions, Crater Lake, Oregon:  American Mineralogist, v. 77, p. 1021-1030.

• Sisson, T. W., and Bacon, C. R., 1992, Garnet-high-silica rhyolite trace element partition coefficients measured by ion microprobe:  Geochimica et Cosmochimica Acta, v. 56, p. 2133-2136.

• La Tourette, T. Z., Burnett, D. S., and Bacon, C. R., 1991, Uranium and minor-element partitioning in Fe-Ti oxides and zircon from partially melted granodiorite, Crater Lake, Oregon:  Geochimica et Cosmochimica Acta, v. 55, p. 457-469.

• Bacon, C. R., 1990, Crater Lake, Oregon:  in Volcanoes of North America, ed. by C. A. Wood and J. Kienle, Cambridge Univeristy Press, p. 193-195.

• Bruggman, P. E., Bacon, C. R., Mee, J. S., Pribble, S. T., and Siems, D. F., 1989, Chemical analyses of volcanic rocks from monogenetic and shild volcanoes near Crater Lake, Oregon:  U.S. Geological Survey Open-File Report 89-562, 15 p.

• Bacon, C. R., Foster, H. L., and Smith, J. G., 1990, Rhyolitic calderas of the Yukon-Tanana terrane, east central Alaska: Volcanic remnants of a mid-Cretaceous magmatic arc: Journal of Geophysical Research, v. 95, p. 21,451-21,461.

• Bacon, C. R., Adami, L. H., and Lanphere, M. A., 1989, Direct evidence for the origin of low-18O silicic magmas: Quenched samples of a magma chamber's partially-fused granitoid walls:  Earth and Planetary Science Letters, v. 96, p. 199-208.

• Bacon, C. R., and Lanphere, M. A., 1990, The geologic setting of Crater Lake, Oregon:  in Crater Lake: An ecosystems study, ed. by E.T. Drake, G.L. Larson, J. Dymond, and R. Collier,  American Association for the Advancement of Science, Pacific Division, San Francisco, p. 19-27.

• Bacon, C. R., Lanphere, M. A., and O'Neil, J. R., 1989, Strontium and oxygen isotopes in volcanic rocks near Crater Lake, Oregon, and their bearing on arc magmatism: in Muffler, L. J. P., Weaver, C. S., and Blackwell, D. D., Geological, geophysical, and tectonic setting of the Cascade Range:  U.S. Geological Survey Open-File Report 89-178, p. 521-555.

• Muffler, L. J. P., Bacon, C. R., Christiansen, R. L., Clynne, M. A., Donnelly-Nolan, J. M., Miller, C. D., Sherrod, D. R., and Smith, J. G., 1989, IGC field trip T312: South Cascades arc volcanism, California and southern Oregon: International Geological Congress, 54 p; also published in IAVCEI field guide, New Mexico Bureau of Mines and Mineral Resources Memoir 47, p. 183-225.

• Bacon, C. R., 1989, Crystallization of accessory phases in magmas by local saturation adjacent to phenocrysts:  Geochimica et Cosmochimica Acta, v. 53, p. 1055-1066.

• Bacon, C. R., 1990, Calc-alkaline, shoshonitic, and primitive tholeiitic lavas from monogenetic volcanoes near Crater Lake, Oregon:  Journal of Petrology, v. 31, p. 135-166.

• Bacon, C. R., 1988, (Acceptance of Wager Prize):  Bulletin of Volcanology:  v. 50, p. 64-65.

• Druitt, T. H., and Bacon, C. R., 1989, Petrology of the zoned calcalkaline magma chamber of Mount Mazama, Crater Lake, Oregon:  Contributions to Mineralogy and Petrology, v. 101, p. 245-259.

• Druitt, T. H., and Bacon, C. R., 1988, Compositional zonation and cumulus processes in the Mount Mazama magma chamber, Crater Lake, Oregon:  Transactions of the Royal Society of Edinburgh: Earth Sciences (Hutton Symposium on the Origin of Granite), v. 79, p. 289-297.

• Bacon, C. R., Hildreth, W., and Druitt, T. H., 1987, Partition coefficients determined from phenocryst and glass analyses of the climactic ejecta of Mount Mazama, Oregon:  U.S. Geological Survey Open-file Report 87-589, 4 p.

• Bacon, C. R., and Druitt, T. H., 1988, Compositional evolution of the zoned calcalkaline magma chamber of Mount Mazama, Crater Lake, Oregon:  Contributions to Mineralogy and Petrology, v. 98, p. 224-256.

• Bacon, C. R., and Hirschmann, M. M., 1988, Mg/Mn partitioning as a test for equilibrium between coexisting Fe-Ti oxides:  American Mineralogist, v. 73, p. 57-61.

• Bacon, C. R., and others, 1987, The Scientific Value of Coring the Proposed Southern Appalachian Research Drill Hole:  National Academy Press, 45 p.

• Nelson, C. H., Carlson, P. R., and Bacon, C. R., 1988, The Mount Mazama climactic eruption (6900 BP) and resulting convulsive sedimentation on the continent, ocean basin, and Crater Lake caldera floor:  In Clifton, H. E., editor, Sedimentologic consequences of convulsive geologic events.  Geological Society of America Special Paper 229, p. 37-57.

• Bruggman, P. E., Bacon, C. R., Aruscavage, P. J., Lerner, R. W., Schwarz, L. J., and Stewart, K. C., 1987, Chemical analyses of rocks and glass separates from Crater Lake National Park and vicinity, Oregon:  U.S. Geological Survey Open-file report, 87-57, 36 p.

• Bacon, C. R., 1987, Mount Mazama and Crater Lake caldera, Oregon:  Geological Society of America Centennial Field Guide, v. 1, p. 301-306.

• Bacon, C. R., 1986, Magmatic inclusions in silicic and intermediate volcanic rocks:  Journal of Geophysical Research, v. 91, p. 6091-6112.

• Druitt, T. H., and Bacon, C. R., 1986, Lithic breccia and ignimbrite erupted during the collapse of Crater Lake caldera, Oregon:  Journal of Volcanology and Geothermal Research, v. 29, p. 1-32.

• Duffield, W. A., Bacon, C. R., and Delaney, P. T., 1986, Deformation of poorly consolidated sediment during shallow emplacement of a basalt sill, Coso Range, California:  Bulletin of Volcanology, v. 48, p. 97-107.

• Bacon, C. R., 1988, Crater Lake:  U.S. Geological Survey topographic map Crater Lake National Park and Vicinity (extensive revision of original text by Howel Williams on back of map), scale 1:62,500.

• Novak, S. W., and Bacon, C. R., 1986, Pliocene volcanic rocks of the Coso Range, Inyo County, California:  U.S. Geological Survey Professional Paper 1383, 44 p.

• Bacon, C. R., 1985, Implications of silicic vent patterns for the presence of large crustal magma chambers:  Journal of Geophysical Research, v. 90, p. 11,243-11,252.

• Bacon, C. R., and Metz, J., 1984, Magmatic inclusions in rhyolites, contaminated basalts, and compositional zonation beneath the Coso volcanic field, California:  Contributions to Mineralogy and Petrology, v. 85, p. 346-365.

• Bacon, C. R., 1983, Eruptive history of Mount Mazama and Crater Lake caldera, Cascade Range, U.S.A.:  Journal of Volcanology and Geothermal Research, v. 18, p.-57-115.

• Dusel-Bacon, C., and Bacon, C. R., 1984, Concordant bands of augen gneiss within metasedimentary rocks in the Big Delta C-2 quadrangle, in Coonrad, W. L., and Elliot, R. L., eds., The United States Geological Survey in Alaska: Accomplishments during 1981, U.S. Geological Survey Circular 868, p. 48-50.

• Muffler, L. J. P., Bacon, C. R., and Duffield, W. A., 1982, Geothermal systems of the Cascade Range:  Proceedings of Pacific Geothermal Conference 1982, Auckland, New Zealand, November 8-12, 1982, p. 337-343.

• Bacon, C. R., 1982, Time-predictable bimodal volcanism in the Coso Range, California:  Geology, v. 10, p. 65-69.

• Bacon, C. R., Giovannetti, D. M., Duffield, W. A., Dalrymple, G. B., and Drake, R. E., 1982, Age of the Coso Formation, Inyo County, California:  U.S. Geological Survey Bulletin 1527, 18 p.

• Bacon, C. R., Macdonald, R., Smith, R. L., and Baedecker, P. A., 1981, Pleistocene high-silica rhyolites of the Coso volcanic field, Inyo County, California:  Journal of Geophysical Research, v. 86, p. 10223-10241.

• Bacon, C. R., Kurasawa, H., Delevaux, M. H., Kistler, R. W., and Doe, B. R., 1984, Lead and strontium isotopic evidence for crustal interaction and compositional zonation in the source regions of Pleistocene basaltic and rhyolitic magmas of the Coso volcanic field, California:  Contributions to Mineralogy and Petrology, v. 85, p. 366-375.

• Plouff, D. W., Isherwood, W. F., Bacon, C. R., Duffield, W. A., and Van Buren, H. M., 1980, Bulk density and magnetization measurements near the Coso Range, California:  U.S. Geological Survey Open-File Report 80-61, 5 p.

• Bacon, C. R., 1980, Goals are set for research in Cascades:  Geotimes, v. 25, p. 16-18. (results of Cascade Conference in Menlo Park)

• Duffield, W. A., and Bacon, C. R., 1981, Geologic map of the Coso volcanic field and adjacent areas, Inyo County, California:  U.S. Geological Survey Miscellaneous Investigations Map I-1200, scale 1:50,000.

• Bacon, C. R., and Duffield, W. A., 1981, Late Cenozoic rhyolites from the Kern Plateau, southern Sierra Nevada, California:  American Journal of Science, v. 280, p. 1-34.

• Duffield, W. A., Bacon, C. R., and Dalrymple, G. B., 1980, Late Cenozoic volcanism, geochronology, and structure of the Coso Range, Inyo County, California:  Journal of Geophysical Research, v. 85, p. 2381-2404.

• Bacon, C. R., Duffield, W. A., and Nakamura, K., 1980, Distribution of Quaternary rhyolite domes of the Coso Range, California:  implications for extent of the geothermal anomaly:  Journal of Geophysical Research, v. 85, p. 2425-2433.

• Duffield, W. A., Bacon, C. R., and Roquemore, G. R., 1979, Origin of reverse-graded bedding in air-fall pumice, Coso Range, California:  Journal of Volcanology and Geothermal Research, v. 5, p. 35-48.

• Bacon, C. R., 1977, High temperature heat content and heat capacity of silicate glasses:  experimental determination and a model for calculation:  American Journal of Science, v. 277, p. 109-135.

• Bacon, C. R., 1975, High-temperature heat capacity of silicate glasses:  Ph.D. Thesis, University of California, Berkeley, 62 p.

• Bacon, C. R., and Carmichael, I. S. E., 1973, Stages in the P-T path of ascending basalt magma:  an example from San Quintin, Baja California:  Contributions to Mineralogy and Petrology, v. 41, p. 1-22.

Volcanology

Bacon, C. R., 1983, Eruptive history of Mount Mazama and Crater Lake caldera, Cascade Range, U.S.A.: Journal of Volcanology and Geothermal Research, v. 18, p. 57-115.

Bacon, C. R., 1990, Crater Lake, Oregon: in Wood, C. A., and Kienle, J., editors, Volcanoes of North America: Cambridge University Press, p. 193-195.

Bacon, C. R., and Lanphere, M. A., 1990, The geologic setting of Crater Lake, Oregon: in Drake, E. T., Collier, R., Dymond, J., and Larson, G. L., editors, Crater Lake: An ecosystems study: American Association for the Advancement of Science, Pacific Division, San Francisco, p. 19-27.

Bacon, C.R., and Lanphere, M.A., 2006, Eruptive history and geochronology of Mount Mazama and the Crater Lake region, Oregon: Geological Society of America Bulletin, v. 118, no. 11, p. 1331-1359, DOI 10.1130/B25906.1.

Bacon, C. R., Mastin, L. G., Scott, K. M., and Nathenson, Manuel, 1997, Volcano and earthquake hazards in the Crater Lake region, Oregon: U.S. Geological Survey Open-File Report 97-487, 32 pages.

Druitt, T. H., and Bacon, C. R., 1986, Lithic breccia and ignimbrite erupted during the collapse of Crater Lake caldera, Oregon: Journal of Volcanology and Geothermal Research, v. 29, p. 1-32.

Kamata, H., Suzuki-Kamata, K., and Bacon, C. R., 1993 Deformation of the Wineglass Welded Tuff and the timing of caldera collapse at Crater Lake, Oregon: Journal of Volcanology and Geothermal Research, v. 56, p. 253-265.

Klimasauskas, Ed, Bacon, Charles, and Alexander, Jim, 2002, Mount Mazama and Crater Lake: Growth and destruction of a Cascade volcano: U.S. Geological Survey Fact Sheet 092-02, 4 p.

Klug, C., Cashman, K. V., and Bacon, C. R., 2002, Structure and physical characteristics of pumice from the climactic eruption of Mount Mazama (Crater Lake), Oregon: Bulletin of Volcanology, v. 64, p. 486-501.

Suzuki-Kamata, K., Kamata, H., and Bacon, C. R., 1993, Evolution of the caldera-forming eruption at Crater Lake, Oregon, indicated by component analysis of lithic fragments: Journal of Geophysical Research, v. 98, p. 14,059-14,074.

Young, S. R., 1990, Physical volcanology of Holocene airfall deposits from Mt. Mazama, Crater Lake, Oregon: PhD thesis, University of Lancaster (UK; Young was USGS Volunteer), 298 pages.

Geothermal systems

Bacon, C.R., and Nathenson, Manuel, 1996, Geothermal resources in the Crater Lake area, Oregon: U.S. Geological Survey, Open-File Report 96-663, 34 p.

Nathenson, Manuel, Mariner, R.H., and Thompson, J.M., 1994, Convective heat discharge of Wood River group of springs in the vicinity of Crater Lake, Oregon: Geothermal Resources Council Transactions, v. 18, p. 229-236.

Geodetic measurements

Chadwick, W. W., Iwatsubo, E. Y., Swanson, D. A., and Ewert, J., 1985, Measurements of slope distances and vertical angles at Mount Baker and Mount Rainier, Washington, Mount Hood and Crater Lake, Oregon, and Mount Shasta and Lassen Peak, California, 1980-1984: U.S. Geological Survey Open-File Report 85-205, 96 pages.

Yamashita, K. M., and Doukas, M. P., 1987, Precise Level Lines at Crater Lake, Newberry Crater, and South Sister, Oregon: U.S. Geological Survey Open-File Report 87-293, 32 pages.

Faults

Bacon, C. R., Lanphere, M. A., and Champion, D. E., 1999, Late Quaternary slip rate and seismic hazards of the West Klamath Lake fault zone near Crater Lake, Oregon Cascades: Geology, V. 27, p. 43-46.

Colman, S. M., Rosenbaum, J. G., Reynolds, R. L., and Sarna-Wojcicki, a. M., 2000, Post-Mazama (7 KA) faulting beneath Upper Klamath Lake, Oregon: Seismological Society of America Bulletin, v. 90, p. 243-247.

Petrology and geochemistry

Bacon, C. R., 1990, Calc-alkaline, shoshonitic, and primitive tholeiitic lavas from monogenetic volcanoes near Crater Lake, Oregon: Journal of Petrology, v. 31, p. 135-166.

Bacon, C. R., 1992, Partially melted granodiorite and related rocks ejected from Crater Lake caldera, Oregon: Transactions of the Royal Society of Edinburgh: Earth Sciences (Hutton Symposium on Granites and Related Rocks), v. 83, p. 27-47. Also in Brown, P.E., and Chappell, B. W., eds., 1992, The Second Hutton Symposium on the origin of granites and related rocks: Geological Society of America Special Paper 272, p. 27-47.

Bacon, C.R., and Lowenstern, J.B., 2005, Late Pleistocene granodiorite source for recycled zircon and phenocrysts in rhyodacite lava at Crater Lake, Oregon: Earth and Planetary Science Letters, v. 233/3-4, p. 277-293, DOI 10.1016/j.epsl.2005.02.012.

Bacon, C. R., Adami, L. H., and Lanphere, M. A., 1989, Direct evidence for the origin of low-18O silicic magmas: Quenched samples of a magma chamber's partially-fused granitoid walls: Earth and Planetary Science Letters, v. 96, p. 199-208.

Bacon, C.R., Bruggman, P.E., Christiansen, R. L., Clynne, M.A., Donnelly-Nolan, J.M., and Hildreth, W., 1997, Primitive magmas at five Cascade volcanic fields: melts from hot, heterogeneous sub-arc mantle: in Nature and Origin of Primitive Magmas at Subduction Zones, Nixon, G.T., Johnston, A.D, and Martin, R.F., editors, Canadian Mineralogist, v. 35, p. 397-423.

Bacon, C. R., and Druitt, T. H., 1988, Compositional evolution of the zoned calcalkaline magma chamber of Mount Mazama, Crater Lake, Oregon: Contributions to Mineralogy and Petrology, v. 98, p. 224-256.

Bacon, C. R., Lanphere, M. A., and O'Neil, J. R., 1988, Strontium and oxygen isotopes in volcanic rocks near Crater Lake, Oregon, and their bearing on arc magmatism: in Muffler, L. J. P., Weaver, C. S., and Blackwell, D. D., editors, Geological, geophysical, and tectonic setting of the Cascade Range: U.S. Geological Survey Open-File Report 89-178, p. 521-555.

Bacon, C. R., Newman, S., and Stolper, E., 1992, Water, CO2, Cl, and F in melt inclusions in phenocrysts from three Holocene explosive eruptions, Crater Lake, Oregon: American Mineralogist, v. 77, p. 1021-1030.

Bacon, C. R., Gunn, S. H., Lanphere, M. A., and Wooden, J. L., 1994, Multiple isotopic components in Quaternary volcanic rocks of the Cascade arc near Crater Lake, Oregon: Journal of Petrology, v. 35, p. 1521-1556.

Bacon, C. R. , Persing, H. M., Wooden, J. L., and Ireland, T. R., 2000, Late Pleistocene granodiorite beneath Crater Lake caldera, Oregon, dated by ion microprobe: Geology, v. 28, p. 467-470.

Druitt, T. H., and Bacon, C. R., 1988, Compositional zonation and cumulus processes in the Mount Mazama magma chamber, Crater Lake, Oregon: Transactions of the Royal Society of Edinburgh: Earth Sciences, v. 79, p. 289-297.

Druitt, T. H., and Bacon, C. R., 1989, Petrology of the zoned calcalkaline magma chamber of Mount Mazama, Crater Lake, Oregon: Contributions to Mineralogy and Petrology, v. 101, p. 245-259.

La Tourette, T. Z., Burnett, D. S., and Bacon, C. R., 1991, Uranium and minor-element partitioning in Fe-Ti oxides and zircon from partially melted granodiorite, Crater Lake, Oregon: Geochimica et Cosmochimica Acta, v. 55, p. 457-469.

Nakada, S., Bacon, C. R., and Gartner, A. E., 1994, Origin of phenocrysts and compositional diversity in pre-Mazama rhyodacite lavas, Crater Lake, Oregon: Journal of Petrology.

Water and lake floor

Bacon, C. R., Gardner, J. V., Mayer, L. A., Buktenica, M. W., Dartnell, P., Ramsey, D. W., and Robinson, J. E., 2002, Morphology, volcanism, and mass wasting in Crater Lake, Oregon: Geological Society of America Bulletin, v. 114, p. 675-692.

Barber, J. H., Jr., and Nelson, C. H., 1990, Sedimentary history of Crater Lake caldera, Oregon: in Drake, E. T., Collier, R., Dymond, J., and Larson, G. L., editors, Crater Lake: An ecosystems study: American Association for the Advancement of Science, Pacific Division, San Francisco, p. 29-39.

Nathenson, M., 1990, Chemical balance for major elements in water in Crater Lake, Oregon: in Drake, E. T., Collier, R., Dymond, J., and Larson, G. L., editors, Crater Lake: An ecosystems study: American Association for the Advancement of Science, Pacific Division, San Francisco, p. 103-114.

Nathenson, M., 1990, Temperatures of springs in the vicinity of Crater Lake, Oregon, in relation to air and ground temperatures: U.S. Geological Survey Open-file Report 90-671, 19 pages.

Nathenson, M., 1992, Review of studies concerning the presence of thermal water inflows into Crater Lake, in Report of the Secretary of the Interior under Section 7 of Public Law 100-443 on the Presence or Absence of Significant Thermal Features within Crater Lake National Park, National Park Service, p. 7-31.

Nathenson, M., 1992, Water balance for Crater Lake, Oregon: U.S. Geological Survey Open-File Report 92-505, 33 pages.

Nathenson, M., and Thompson, J. M., 1990, Chemistry of Crater Lake, Oregon, and nearby springs in relation to weathering: in Drake, E. T., Collier, R., Dymond, J., and Larson, G. L., editors, Crater Lake: An ecosystems study: American Association for the Advancement of Science, Pacific Division, San Francisco, p. 115-126.

Nathenson, M., Bacon, C.R., and Ramsey, D.W., 2007, Subaqueous geology and a filling model for Crater Lake, Oregon: Hydrobiologia, v. 574, p. 13-27, DOI 10.1007/s10750-006-0343-5.

Nelson, C. H., Carlson, P. R., and Bacon, C. R., 1988, The Mount Mazama climactic eruption (6900 BP) and resulting convulsive sedimentation on the continent, ocean basin, and Crater Lake caldera floor: in , Clifton, H. E., editor, Sedimentologic consequences of convulsive geologic events. Geological Society of America Special Paper 229, p. 37-57.

Nelson, C. H., Meyer, A. W., Thor, D., and Larsen, M., 1986, Crater Lake, Oregon: A restricted basin with base-of-slope aprons of nonchannelized turbidites: Geology, v. 14, p. 238-241.

Nelson, C. H., Bacon, C. R., Robinson, S. W., Adam, D. P., Bradbury, J. P., Barber, J. H., Jr., Schwartz, D., and Vagenas, G., 1994, The volcanic, sedimentologic and paleolimnologic history of the Crater Lake caldera floor, Oregon: Evidence for small caldera evolution: Geological Society of America Bulletin, v. 106, p. 684-704.

Thompson, J. M., Nathenson, M., and White, L. D., 1990, Chemical and isotopic compositions of waters from Crater Lake, Oregon, and nearby vicinity: in Drake, E. T., Collier, R., Dymond, J., and Larson, G. L., editors, Crater Lake: An ecosystems study: American Association for the Advancement of Science, Pacific Division, San Francisco, p. 91-102.

Williams, D. L., and Von Herzen, R. P., 1983, On the terrestrial heat flow and physical limnology of Crater Lake, Oregon: Journal of Geophysical Research, v. 88, p. 1094-1104.

Maps

Bacon, C R., 2008, Geologic map of Mount Mazama and Crater Lake Caldera, Oregon: U.S. Geological Survey Scientific Investigations Map 2832, 4 sheets, scale 1:24,000, 45 p. [http://pubs.usgs.gov/sim/2832/].

Gardner, J.V., Dartnell, P., Hellequin, L., Bacon, C.R., Mayer, L.A., Buktenica, M.W., and Stone, J.C., 2001, Bathymetry and selected perspective views of Crater Lake, Oregon: U.S. Geological Survey, Water Resources Investigations Report 01-4046, 2 sheets.

U. S. Geological Survey, 1988, Crater Lake National Park and Vicinity, Oregon: scale 1:62,500 (topographic map with extensive revision by C. R. Bacon of original text by Howel Williams on back).

Field guides

Bacon, C. R., 1987, Mount Mazama and Crater Lake caldera, Oregon: Geological of America Centennial Field Guide, v. 1, p. 301-306.

Muffler, L. J. P., Bacon, C. R., Christiansen, R. L., Clynne, M. A., Donnelly-Nolan, J. M., Miller, C. D., Sherrod, D. R., and Smith, J. G., 1989, IAVCEI Excursion 12B: South Cascades arc volcanism, California and southern Oregon: New Mexico Bureau of Mines and Mineral Resources Memoir 47, p. 183-225.

General papers based in part on work at Crater Lake

Bacon, C. R., 1985, Implications of silicic vent patterns for the presence of large crustal magma chambers: Journal of Geophysical Research, v. 90, p. 11,243-11,252.

Bacon, C. R., 1986, Magmatic inclusions in silicic and intermediate volcanic rocks: Journal of Geophysical Research, v. 91, p. 6091-6112.

Bacon, C. R., 1989, Crystallization of accessory phases in magmas by local saturation adjacent to phenocrysts: Geochimica et Cosmochimica Acta, v. 53, p. 1055-1066.

Sisson, T.W., and Bacon, C.R., 1999, Gas-driven filter pressing in magmas: Geology, v. 27, p. 613-616.

Geochemical data

Bacon, C. R., Hildreth, W., and Druitt, T. H., 1987, Partition coefficients determined from phenocryst and glass analyses of the climactic ejecta of Mount Mazama, Oregon: U.S. Geological Survey Open-file Report 87-589, 4 pages.

Bruggman, P. E., Bacon, C. R., Aruscavage, P. J., Lerner, R. W., Schwarz, L. J., and Stewart, K. C., 1987, Chemical analyses of rocks and glass separates from Crater Lake National Park and vicinity, Oregon: U.S. Geological Survey Open-file Report, 87-57, 36 pages.

Bruggman, P. E., Bacon, C. R., Mee, J. S., Pribble, S. T., and Siems, D. F., 1989, Chemical analyses of volcanic rocks from monogenetic and shield volcanoes near Crater Lake, Oregon: U.S. Geological Survey Open-file Report, 89-562, 17 pages.

Bruggman, P. E., Bacon, C. R., Mee, J. S., Pribble, S. T., and Siems, D. F., 1993, Chemical analyses of pre-Mazama silicic volcanic rocks, inclusions, and glass separates, Crater Lake, Oregon: U.S. Geological Survey Open-file Report 93-314, 20 pages