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Curriculum Vitae

Nikolas I. Christensen

Education

• Ph.D. University of Wisconsin-Madison, 1963
• M.S. University of Wisconsin-Madison, 1961
• B.S. University of Wisconsin-Madison, 1959

Positions Held

• Honorary Professor, University of British Columbia, 2005-present
• Emeritus Professor, University of Wisconsin-Madison, 2004-present
• Albert and Alice Weeks Professor of Geology and Geophysics, University of Wisconsin-Madison, 1997-04
• Professor of Earth and Atmospheric Science, Purdue University, 1983-97
• Professor of Geology and Geophysics,, University of Washington, 1972-83
• Assistant-Associate Professor, University of Washington, 1966-72
• Assistant Professor, University of Southern California, 1964-66
• Research fellow in geophysics, Harvard University, 1963-64

Professional Experience (Partial Listing)

• American Geophysical Union:
  1. Fellows Committee, 1997-9
  2. J. Geophysical Research Associate Editor, 1998-2002
• Ocean Drilling Program/Deep Sea Drilling Program:
  1. Igneous and Metamorphic Rock Advisory Panel, 1974-75
  2. Pacific Advisory Panel, 1974-75
  3. Ocean Crust Advisory Panel, 1974-74;
  4. Downhole Measurements Advisory Panel, 1974-82
• Drilling, Observation, and Sampling of the Earth's Continental Crust (DOSECC):
  1. Board of Directors, 1995-98, 2003-2005
• Geological Society of America:
  1. Committee on Arthur L. Day Medal Award, 1977-79
  2. Geophysics Division First Vice-chair, 1984, Chair, 1985
  3. JTPC, Geophysics Division Representative, 1984
  4. Editorial Board, Geology, 1985-87
  5. Geophysics Division Panel on George P. Woollard Award, 1997-99, Chair 1999
  6. Committee on Nominations, 1997
• International Association of Seismology and Physics of the Earth's Interior (ASPE):
  1. Advisory Panel on Determination of Density and Stress Distribution Within the Earth, 1980-85
  2. Advisory Panel on Wave Propagation in Anisotropic Media, 1983-88
  3. Advisory Panel on Dynamics of the Subcontinental Mantle, 1992-95
  4. Advisory Panel on Processes in the Lithosphere as Reflected on Integrated Petrological and Geophysical Studies, 1992-95
• Academy of Sciences, National Research Council:
  1. Advisory Panel on Seismological Studies of the Continental Lithosphere, 1979-87
• National Science Foundation:
  1. Oceanography Review Panel, 1976-79
  2. Science and Technology Research Centers Site Visit Panel, 1989
  3. Instrumentation and Facilities Review Panel, 1994-1997
  4. Digital Earth Workshop Steering Committee, 2000-2001
• Purdue University:
  1. Associate Head, 1988-93
• University of Washington:
  1. Associate Chairman Geoscience Department, 1974-1979
  2. Associate Chairman Geophysics Program, 1970-80
  3. Adjunct Professor Oceanography Department,1970-1984
• University of Wisconsin-Madison:
  1. Department of Geology and Geophysics Alumni Advisory Board, 1992-97
  2. Faculty Senate, 1997-2002

Awards

• Excellence in Teaching Award, University of Wisconsin-Madison, 1962
• Fellow, Geological Society of America, 1969
• Science Student Council Teaching Award, Purdue University, 1986
• Fellow, American Geophysical Union, 1995
• George P. Woollard Award, Geological Society of America, 1996, PDF
• Albert and Alice Weeks Professorship, University of Wisconsin-Madison, 1997-2004

Publications

Laudon, T. S., J. C. Behrendt, and N. I. Christensen (1964), Petrology of rocks collected on the Antarctic Peninsula traverse, J. Sed. Petr., 34, 360-364.

Gates, R. M., and N. I. Christensen (1965), The bedrock geology of the west Torrington Quadrangle, Connecticut Geological and Natural History Survey, 38.

Christensen, N. I. (1965), Compressional wave velocities in metamorphic rocks at pressures to 10 kilobars, J. Geophys. Res., 70, 6147-6164.

Christensen, N. I. (1966), Compressional wave velocities in single crystals of alkali feldspar at pressures to 10 kilobars, J. Geophys. Res., 71, 3113-3116.

Christensen, N. I. (1966), Shear wave velocities in metamorphic rocks at pressures to kilobars, J. Geophys. Res., 71, 3549-3556.

Christensen, N. I. (1966), Elasticity of ultrabasic rocks, J. Geophys. Res., 71, 5921-5931.

Christensen, N. I. (1968), Compressional wave velocities in basic rocks, Pacific Sci., 22, 41-44.

Christensen, N. I., and R. S. Crosson (1968), Seismic anisotropy in the upper mantle, Tectonophysics, 6, 93-107.

Christensen, N. I. (1968), Chemical changes associated with upper mantle structure, Tectonophysics, 6, 331-342.

Crosson, R. S., and N. I. Christensen (1969), Transverse isotropy of the upper mantle in the vicinity of Pacific fracture zones, Bull. Seis. Soc. Am., 59, 59-72.

Christensen, N. I., R. C. Bostrom, and R. S. Crosson (1969), The gravity program of the University of Washington, Trans. Am. Geophys. U., 50, 548.

Christensen, N. I. (1970), Composition and evolution of the oceanic crust, Mar. Geol., 8, 139-154.

Shaw, G. H., and N. I. Christensen (1970), Simple, inexpensive electrical insulating leads for high pressure applications, The Rev. of Sci. Inst., 41, 277-278.

Christensen, N. I. (1970), Possible greenschist facies metamorphism of the oceanic crust, Geol. Soc. Am. Bull., 81, 905-908.

Christensen, N. I. (1970), Compressional wave velocities in basalts from the Juan de Fuca Ridge, J. Geophys. Res., 75, 2773-2776.

Christensen, N. I., and G. H. Shaw (1970), Elasticity of mafic rocks from the Mid-Atlantic Ridge, Geophys. J.R. Astr. Soc., 20, 271-284.

Christensen, N. I. (1971), Fabric, seismic anisotropy and tectonic history of the Twin Sisters dunite, Geol. Soc. Am. Bull., 82, 1681-1694.

Christensen, N. I., and R. Ramananantrandro (1971), The elastic moduli and anisotropy of dunite to 10 kilobars, J. Geophys. Res., 76, 4003-4010.

Christensen, N. I. (1971), Shear wave propagation in rocks, Nature, 229, 549-550.

Christensen, N. I. (1972), Elastic properties of polycrystalline magnesium, iron and manganese carbonates to 10 kilobars, J. Geophys. Res., 77, 369-372.

Christensen, N. I. (1972), Seismic anisotropy in the lower oceanic crust, Nature, 237, 450-451.

Christensen, N. I. (1972), Compressional and shear wave velocities at pressure to 10 kilobars for basalts from the East Pacific Rise, Geophys. J.R. Astr. Soc., 28, 425-429.

Christensen, N. I. (1972), The abundance of serpentinites in the oceanic crust, J. Geol., 80, 709-719.

Christensen, N. I., and M. H. Salisbury (1972), Seafloor spreading, progressive alteration of layer 2 basalts, and associated changes in seismic velocities, Earth Planet. Sci. Lett., 15, 367-375.

Christensen, N. I. (1973), Compressional and shear wave velocities in basaltic rocks, Deep Sea Drilling Project, Leg 16, in Initial Reports of the Deep Sea Drilling Project, Vol. XVI, edited by T. H. van Andel, G. R. Heath, et al., pp. 647-650, U.S. Govt. Ptg. Ofc., Washington, DC.

Christensen, N. I. (1973), Elastic wave velocities and moduli of basalts, Deep Sea Drilling Project, Leg 19, Initial Reports of the Deep Sea Drilling Project, Vol. 19, edited by J. S. Creager, D. W. Scholl, et al., pp. 657-659, U.S. Govt. Ptg. Ofc., Washington, DC.

Salisbury, M. H., and N. I. Christensen (1973), Progressive weathering of submarine basalt with age: further evidence of seafloor spreading, Geology, 1, 63-64.

Christensen, N. I., and M. H. Salisbury (1973), Velocities, elastic moduli and weathering age-relations for Pacific layer 2 basalts, Earth Planet. Sci. Lett., 19, 461-470.

Christensen, N. I. (1973), D. M. Fountain, and R. J. Stewart, Oceanic crustal basement: a comparison of seismic properties of DSDP basalts and consolidated sediments, Mar. Geol., 15, 215-226.

Christensen, N. I., F. Frey, D. MacDougall, et al. (1973), Deep Sea Drilling Project: Properties of igneous and metamorphic rocks of the oceanic crust, Trans. Am. Geophys. Un., 54, 972-982.

Christensen, N. I. (1974), The petrologic nature of the lower oceanic crust and upper mantle, in Geodynamics of Iceland and the North Atlantic Area, edited by Kristjansson, pp. 165-176, D. Reidel, Dordrecht-Holland.

Christensen, N. I., D. M. Fountain, R. L. Carlson, and M. H. Salisbury (1974), Velocities and elastic moduli of volcanic and sedimentary rocks recovered on DSDP Leg 25, in Initial Reports of the Deep Sea Drilling Project, Vol. XXV, edited by E. S. W. Simpson, R. Schlich, et al., pp. 357-360, U.S. Govt. Ptg. Ofc., Washington, DC.

Christensen, N. I., M. H. Salisbury, D. M. Fountain, and R. L. Carlson (1974), Velocities of compressional and shear waves in DSDP Leg 27 basalts, in Initial Reports of the Deep Sea Drilling Project, Vol. XXVII, edited by J. J. Veevers, J. R. Heirtzler, et al., pp. 445-470, U.S. Govt. Ptg. Ofc., Washington, DC.

Christensen, N. I. (1974), Compressional wave velocities in possible mantle rocks to pressures of 30 kilobars, J. Geophys. Res., 79, 407-412.

Christensen, N. I., and D. M. Fountain (1975), Constitution of the lower continental crust based on experimental studies of seismic velocities in granulite, Geol. Soc. Am. Bull., 86, 227-236.

Christensen, N. I., R. L. Carlson, M. H. Salisbury, and D. M. Fountain (1975), Elastic wave velocities in volcanic and plutonic rocks recovered on DSDP Leg 31, in Initial Reports of the Deep Sea Drilling Project, Vol. XXXI, edited by D. E. Karig, J. C. Ingle Jr. et al., pp. 607-610, U.S. Govt. Ptg. Ofc., Washington, DC.

Christensen, N. I., and M. H. Salisbury (1975), Structure and constitution of the lower oceanic crust, Rev. Geophys. Space Phys., 13, 57-86.

Fountain, D. M., R. L. Carlson, M. H. Salisbury, and N. I. Christensen (1975), Possible lower crustal rocks recovered on Leg 31 by deep-sea drilling in the Philippine Sea, Mar. Geol., 19, M75-M80, .

Salisbury, M. H., and N. I. Christensen (1976), Sonic velocities and densities of basalts from the Nazca Plate, DSDP Leg 34, in Initial Reports of the Deep Sea Drilling Project, Vol. XXXIV, edited by R. S. Yeats, S. R. Hart, et al., pp. 543-546, U.S. Govt. Ptg. Ofc., Washington, DC.

Christensen, N. I. (1976), Seismic velocities, densities and elastic constants of basalts from DSDP Leg 35, in Initial Reports of the Deep Sea Drilling Project, Vol. XXV, edited by D. C. Hollister, C. Craddock, et al., pp. 335-340, U.S. Govt. Ptg. Ofc., Washington DC.

Allegre, C., E. Bonatti, J. Cann, N. I. Christensen, et al. (1976), International conference on the nature of the oceanic crust, EOS Trans. Am. Geophys. Un., 57, 393-401.

Christensen, N. I. (1976), Minerals of Washington, Pacific Search, 10(6), 33.

Christensen, N. I. (1977), Seismic velocities in Leg 37 rocks and their geophysical implications, in Initial Reports of the Deep Sea Drilling Project, Vol. XXXVII, edited by F. Aumento, W.G. Melson, et al., pp. 389-393, U.S. Govt. Ptg. Ofc., Washington, DC.

Carlson, R. L., and N. I. Christensen (1977), Velocities, densities, and elastic constants of basalt and trachytic tuff, DSDP Leg 39, in Initial Reports of the Deep Sea Drilling Project, Vol. XXXIX, edited by P. R. Supko, K. Perch-Nielsen, et al., pp. 493-496, U.S. Govt. Ptg. Ofc. Washington, DC.

Carlson, R. L., and N. I. Christensen (1977), Velocity anisotropy and physical properties of deep sea sediments from the Western South Atlantic, in Initial Reports of the Deep Sea Drilling Project, Vol. XXXIX, edited by P. R. Supko, K. Perch-Nielsen, et al., pp. 555-560, U.S. Govt. Ptg. Ofc., Washington, DC.

Christensen, N. I. (1977), The geophysical significance of oceanic plagiogranite, Earth Planet. Sci. Lett., 36, 297-300.

Christensen, N. I. (1977), Seismic velocities and elastic moduli of igenous and metamorphic rocks from the Indian Ocean, in Indian Ocean Geology and Biostratigraphy, edited by J. R. Heirtzler, H. M. Bolli, et al., pp. 279-299, Am. Geophys. Un.

Christensen, N. I. (1978), Ophiolites, seismic velocities and ocean crustal structure, Tectonophysics, 47, 131-157.

Salisbury, M. H., and N. I. Christensen (1978), The seismic velocity structure of a traverse through the Bay of Islands Ophiolite Complex, Newfoundland, an exposure of oceanic crust and upper mantle, J. Geophys. Res., 83, 805-817.

Christensen, N. I., R. D. Hyndman, J. M. Hull, and M. H. Salisbury (1978), Electrical resistivities, densities, and porosities of basalts from DSDP Leg 46, in Initial Reports of the Deep Sea Drilling Project, Vol. XLVI, edited by L. Dmitriev, J. Heirtzler, et al., pp. 383-388, U.S. Govt. Ptg. Ofc., Washington, DC.

Carlson, R. L., and N. I. Christensen (1979), Velocity anisotropy in semi-indurated calcareous deep sea sediments, J. Geophys. Res., 84, 205-211.

Hyndman, R. D., N. I. Christensen, and M. J. Drury (1979), Seismic velocities, densities, electrical resistivities, porosities and thermal conductivities of core samples from boreholes into the islands of Bermuda and the Azores, in Deep Drilling Results in the Atlantic Ocean: Ocean Crust, Maurice Ewing Series 2, edited by M. Talwani, C. G. Harrison, and D. E. Hayes, pp. 94-112, Am. Geophys. Un.

Salisbury, M. H., R. Stephen, N. I. Christensen, and J. Francheteau (1979), The physical state of the upper levels of Cretaceous oceanic crust from the results of logging, laboratory studies and the oblique seismic experiment at DSDP sites 417 and 418, in Deep Drilling Results in the Atlantic Ocean: Ocean Crust, Maurice Ewing Series 2, edited by M. Talwani, C. G. Harrison, and D. E. Hayes, pp. 113-134, Am. Geophys. Un.

Christensen, N. I. (1979), Compressional wave velocities in rocks at high temperatures and pressures, critical thermal gradients, and crustal low-velocity zones, J. Geophys. Res., 84, 6849-6857.

Gibson, I. L., and N. I. Christensen, et al. (1979), Crust of oceanic affinity in Iceland, Nature, 281, 347-351.

Christensen, N. I., J. M. Hull, and K. A. Hubert (1979), Seismic velocities, densities and elastic constants at elevated pressures of basalts and volcaniclastic breccias, DSDP Leg 43, in Initial Reports of the Deep Sea Drilling Project, Vol. XLIII, edited by B. E. Tucholke, P. R. Vogt, et al., pp. 769-772, U.S. Govt. Ptg. Ofc., Washington, DC.

Christensen, N. I., S. C. Blair, R. H. Wilkens, and M. H. Salisbury (1979), Compressional wave velocities, densities, and porosities of basalts from holes 417A, 417D, 418A, Deep Sea Drilling Project legs 51-53, in Initial Reports of the Deep Sea Drilling Project, Vol. LI, LII, LIII, edited by T. Donnelly, J. Francheteau, et al., pp. 1467-1471 U.S. Govt. Ptg. Ofc., Washington, DC.

Christensen, N. I., and M. H. Salisbury (1979), Seismic anisotropy in the oceanic upper mantle: Evidence from the Bay of Islands Ophiolite Complex, J. Geophys. Res., 84, 4601-4610.

Salisbury, M. H., and N. I. Christensen (1979), The seismic velocity structure of a traverse through the Bay of Islands Ophiolite Complex, Newfoundland, an exposure of oceanic crust and upper mantle, reply to Casey et al., J. Geophys. Res., 84, 6301-6302.

Carlson, R. L., N. I. Christensen, and R. P. Moore (1980), Anomalous crustal structures in ocean basins: continental fragments and oceanic plateaus, Earth and Planet. Sci. Lett., 51, 171-180.

Christensen, N. I., R. H. Wilkens, S. C. Blair, and R. L. Carlson (1980), Seismic velocities, densities, and elastic constants of volcanic breccias and basalt, DSDP Leg 59, in Initial Reports of the Deep Sea Drilling Project, Vol. LIX, edited by L. Kroenke, R. Scott, et al., pp. 515-518, U.S. Govt. Ptg. Ofc., Washington, DC.

Carlson, R. L., N. I. Christensen, and R. H. Wilkens (1980), Acoustic properties of volcaniclastic sediments recovered from the floor of the Philippine Sea, DSDP Leg 59, in Initial Reports of the Deep Sea Drilling Project, Vol. LIX, edited by L. Kroenke, R. Scott, et al., pp. 519-522, U.S. Govt. Ptg. Ofc., Washington, DC.

Christensen, N. I., and J. D. Smewing (1981), Geology and seismic structure of the northern section of the Oman ophiolite, J. Geophys. Res., 86, 2545-2556.

Christensen, N. I., R. H. Wilkens, S. M. Lundquist, and J. P. Schultz (1981), Seismic properties of volcanic rocks from Hess Rise, in Initial Reports of the Deep Sea Drilling Project, Vol. LXII, edited by J. Thiede, T. L. Vallier, et al., pp. 1005-1007, U.S. Govt. Ptg. Ofc., Washington, DC.

Christensen, N. I. (1982), Seismic velocities, in Handbook of Physical Properties of Rocks, Vol. II, edited by R. S. Carmichael, pp. 1-228, CRC Press.

Christensen, N. I., S. C. Blair, R. C. Prior, and J. P. Schultz (1982), Seismic velocities at elevated pressures of igneous rocks from the Mariana Trough and fore-arc region, Deep Sea Drilling Project Leg 60, in Initial Reports of the Deep Sea Drilling Project, 60, edited by D. M. Hussong, S. Uyeda, et al., pp. 805-806, U.S. Govt. Ptg. Ofc., Washington, DC.

Christensen, N. I., and M. H. Salisbury (1982), Lateral heterogeneity in the seismic structure of the oceanic crust, Geophys. J.R. Astr. Soc., 68, 675-688.

Christensen, N. I., and S. M. Lundquist (1982), Pyroxene orientation within the upper mantle, Geol. Soc. Am. Bull., 93, 279-288.

Fridleifsson, I. B., I. L. Gibson, ..., N. I. Christensen, H. V. Schmincke, and G. Schonharting (1982), The Iceland research drilling project, J. Geophys. Res., 87, 6359-6362.

Christensen, N. I., and R. H. Wilkens (1982), Seismic properties, density, and composition of the Icelandic crust near Reydarfjordur, J. Geophys. Res., 87, 6389-6395.

Robinson, P. T., J. M. Hall, N. I. Christensen, et al. (1982), The Iceland research drilling project: synthesis of results and implications for the nature of Icelandic and oceanic crust, J. Geophys. Res., 87, 6657-6667.

Christensen, N. I., and B. T. R. Lewis (1983), Physical properties of Leg 65 basalts, in Initial Reports of the Deep Sea Drilling Project, 65, edited by B. T. R. Lewis, P. Robinson, et al., U.S. Govt. Ptg. Ofc., Washington, DC, 693-696.

Wilkens, R. H., N. I. Christensen, and L. Slater (1983), High-pressure seismic studies of Leg 69 and 70 basalts, in Initial Reports of the Deep Sea Drilling Project, 69, edited by J. R. Cann, et al., pp. 683-686, U.S. Govt. Ptg. Ofc., Washington, DC.

Christensen, N. I., Inhomogeneity in the upper mantle (1983), Structure and Dynamics of Transition Zones, Academy of Sciences of the USSR Soviet Geophysical Committee, 153-155.

Christensen, N. I. (1984), The magnitude, symmetry and origin of upper mantle anisotropy based on fabric analyses of ultramafic tectonites, Geophys. J.R. Astr. Soc., 76, 89-111.

Christensen, N. I. (1984), Structure and origin of the Dun Mountain ultramafic massif, New Zealand, Geol. Soc. Am. Bull., 95, 551-558.

Smewing, J. D., N. I. Christensen, I. D. Bartholomew, and P. Browning (1984), The structure of the oceanic upper mantle and lower crust as deduced from the northern section of the Oman ophiolite, in Ophiolites and Oceanic Lithosphere, edited by I. G. Gass et al., pp. 41-53, Blackwell Scientific Publications, England.

Hyndman, R. D., N. I. Christensen, and M. J. Drury (1984), The physical properties of basalt core samples from Deep Sea Drilling Project Leg 78B Hole 395A, in Initial Reports of the Deep Sea Drilling Project, 78, edited by B. Biju-Duval, J. C. Moore, et al., pp. 801-810, U.S. Govt. Ptg. Ofc., Washington, DC.

Christensen, N. I. (1984), Pore pressure and oceanic crustal seismic structure, Geophys. J.R. Astr. Soc., 79, 411-424.

Christensen, N.I., and M. H. Salisbury (1985), Seismic velocities, densities, and porosities of layer 2B and layer 2C basalts from Hole 504B, in Initial Reports of the Deep Sea Drilling Project,, 83, edited by R. N. Anderson, J. Honnorez, K. Becker, et al., pp. 367-370, U.S. Govt. Ptg. Ofc, Washington, DC.

Salisbury, M. H., N. I. Christensen, K. Becker, and D. Moos (1985), The velocity structure of Layer 2 at Deep Sea Drilling Project Site 504 from logging and laboratory experiments, in Initial Reports of the Deep Sea Drilling Project, 83, edited by R. N. Anderson, J. Honnorez, K. Becker, et al., pp. 529-539, U.S. Govt. Ptg. Ofc, Washington, DC.

Christensen, N. I., and H. F. Wang (1985), The influence of pore pressure and confining pressure on dynamic elastic properties of Berea sandstone, Geophysics, 50, 207-213.

Christensen, N. I. (1985), Measurements of dynamic properties of rock at elevated pressures and temperatures, in American Society for Testing and Materials, edited by H.J. Pincus, and E. R. Hoskins, pp. 93-107, ASTM STP869, Philadelphia.

Salisbury, M. H., and N. I. Christensen (1985), Olivine fabrics in the Bay of Islands Ophiolite: Implications for mantle structure and anisotropy, Canadian Journal of Earth Sciences, 22, 1757-1766.

Christensen, N. I. (1986), The influence of pore pressure on oceanic crustal seismic velocities, Jour. of Geodynamics, 5, 45-49.

Christensen, N. I., and H. F. Wang (1986), The influence of pore pressure and confining pressure on dynamic elastic properties of Berea Sandstone-reply to Gardner, Geophysics, 51, 1016-1018.

Nicolas, A., and N. I. Christensen (1987), Formation of anisotropy in uppermantle peridotites—a review, in The Composition, Structure and Dynamics of the Lithosphere-Asthenosphere System, American Geophysical Union Geodynamics Series, edited by C. Froidevaux and K. Fuchs, pp. 111-123.

Christensen, N. I., W. W. Wepfer, and M. H. Salisbury (1987), Seismic properties of samples from the volcanic section of the Troodos Ophiolite, Hole CY-2a, in Cyprus Crustal Study Project Initial Report Hole CY2-2a, Geological Survey of Canada Paper, edited by P. T. Robinson, I. L. Gibson, and A. Panayiotou, pp. 307-315.

Christensen, N. I. (1987), The interpretation of seismic velocities in the continental crust based on laboratory seismology, in Geophysics and petrology of the deep crust and upper mantle, U.S. Geological Survey Circular, 956, edited by J. S. Noller, S. H. Kirby, and J. E. Nielson-Pike, pp. 23-25.

Christensen, N. I., and D. Szymanski (1988), The origin of reflections from the Brevard Fault Zone, Jour. of Geophys. Res., 93, 1087-1102.

Christensen, N. I., and R. Ramananantoandro (1988), Permeability of the oceanic crust based on experimental studies of basalt permeability at elevated pressures, Tectonophysics, 149, 181-186.

Salisbury, M. H., J. H. Scott, N. I. Christensen, et al. (1988), Old oceanic crust, synthesis of logging, laboratory and seismic data from Leg 102, in Proceedings Ocean Drilling Program, Scientific Results 102, College Station, TX, edited by M. H. Salisbury, J. H. Scott, et al., pp. 155-180.

Christensen, N. I. (1989), Seismic Properties of Rocks, in Encyclopedia of Geophysics, edited by D. E. James, pp. 1093-1098, Van Nostrand Reinhold and Company, New York.

Brocher, T. M., M. A. Fisher, E. L. Geist, and N. I. Christensen (1989), A high-resolution seismic reflection/refraction study of the Chugach-Peninsular terrane boundary, southern Alaska, J. Geophys. Res., 94, 4441-4455.

Salisbury, M. H., N. I. Christensen, F. J. Vine, G. C. Smith, and S. Eleftherion (1989), Geophysical structure of the Troodos ophiolite from downhole logging, in Cyprus Crustal Study Project: Initial Report, Hole CY-4, Geological Survey of Canada, Paper 88-9, edited by I. L. Gibson, J. Malpas, P. R. Robinson, and C. Xenophontos, pp. 331-349.

Brocher, T. M., M. A. Fisher, E. L. Geist, and N. I. Christensen (1989), A high-resolution seismic reflection/refraction study of the Chugach-Peninsular terrane boundary, southern Alaska, J. Geophys. Res., 94, 4441-4455.

Christensen, N. I., and M. H. Salisbury (1989), Velocity structure of the Troodos Massif, an arc-derived ophiolite, in Cyprus Crustal Study Project: Initial Report, Hole CY-4, Geological Survey of Canada, Paper 88-9, edited by I. L. Gibson, J. Malpas, P. T. Robinson, and C. Xenophontos, pp. 351-369.

Christensen, N. I., W. W. Wepfer, and R. D. Baud (1989), Seismic properties of sheeted dikes from Hole 504B, ODP Leg 111, in Proceedings of the Ocean Drilling Program, Scientific Results, Vol. III, College Station, TX (Ocean Drilling Program), edited by Becker K., Sakai, H., et al., pp. 171-176.

Christensen, N. I. (1989), Seismic velocities, in CRC Practical Handbook of Physical Properties of Rocks and Minerals, edited by R. S. Carmichael, pp. 429-546, CRC Press, Boca Raton.

Fuis, G. S., E. L Ambos, W. D. Mooney, and N. I. Christensen (1989), Summary of deep structure of accreted terranes in the Chugach Mountains and Copper River Basin, southern Alaska from seismic refraction results, in Alaskan Geological and Geophysical Transect: Valdez to Coldfoot, Alaska, International Geological Congress Field Trip Guidebook T104, edited by W. J. Nokleberg, and M. A. Fisher, pp. 23-26.

Christensen, N. I. (1989), Oceanic Crust, in Encyclopedia of Igneous and Metamorphic Petrology, edited by D. R. Bowes, pp. 405-411, Van Nostrand-Reinhold, New York.

Christensen, N. I. (1989), Observation of the continental crust through drilling I and II, book review, Geophysical Journal, 98, 633.

Christensen, N. I. (1989), Reflectivity and seismic structure of the deep continental crust, J. Geophys. Res., 94, 17, 793-17, 804.

Christensen, N. I., and W. W. Wepfer (1989), Laboratory techniques for determining seismic velocities and attenuations, with applications to the continental lithosphere, in Geophysical Framework of the Continental United States, edited by L. C. Pakiser Jr. and W. D. Mooney, Geol. Soc. Am. Memoir 172, pp. 91-102.

Fountain, D. M., and N. I. Christensen (1989), Composition of the continental crust: A review, in Geophysical Framework of the Continental United States, edited by L. C. Pakiser Jr. and W. D. Mooney, Geol. Soc. Am. Memoir 172, 711-742.

Christensen, N. I. (1989), Pore pressure, seismic velocities and crustal composition, in Geophysical framework of the continental United States: Boulder Colorado, Geol. Soc. Am. Memoir 172, edited by L.C. Pakiser Jr. and W.D. Mooney, pp. 783-798.

Brocher, T. M., and N. I. Christensen (1990), Seismic anisotropy due to preferred mineral orientation observed in shallow crustal rocks in southern Alaska, Geology, 18, 737-740.

Wepfer, W. W., and N. I. Christensen (1990), Compressional wave attenuation in oceanic basalt, J. Geophys. Res., 95, 17, 431-17, 439.

Christensen, N. I. (1991), Petrophysics, GSA Today, 1, 103.

Christensen, N. I. (1991), The German Continental Deep Drilling Program-book review (KTB), edited by R. Emmermann and J Wohlenberg, book review, Geophys. J. Int., 105, 806.

Christensen, N. I., and D. L. Szymanski (1991), Seismic properties and the origin of reflectivity from a classic Paleozoic sedimentary sequence, Valley and Ridge province, southern Appalachians, Geol. Soc. Am. Bull., 103, 277-289.

Fuis, G. S., E. L. Ambos, W. D. Mooney, N. I. Christensen, and E. Geist (1991), Crustal structure of accreted terranes in Southern Alaska, Chugach Mountains and Copper River Basin, from seismic refraction results, J. Geophys. Res., 96, 4187-4227.

Brocher, T. M., W. J. Nokleberg, N. I. Christensen (1991), et al., Seismic reflection/refraction mapping of faulting and regional dips in the Eastern Alaska Range, J. Geophys. Res., 96, 10, 233-10, 249.

Brocher, T. M., and N. I. Christensen (1991), Seismic anisotropy due to preferred mineral orientation observed in shallow crustal rocks in southern Alaska: Reply to Crampin, Geology, 19, 859-860.

Iturrino, G. J., and N. I. Christensen (1991), Reflectivity modeling of the Layer 3 gabbroic sequence drilled at the Atlantis II fracutre zone, in Proceedings of the Ocean Drilling Program, Scientific Results, 188, College Station, TX (Ocean Drilling Program), edited by R. P. von Herzen, P. T. Robinson, et al., pp. 245-251.

Iturrino, G. J., N. I. Christensen, S. Kirby, and M. H. Salisbury (1991), Seismic velocities and elastic properties of oceanic gabbroic rocks from Hole 735B, in Proceedings of the Ocean Drilling Program, Scientific Results, 118, College Station, TX (Ocean Drilling Program), edited by R. P. von Herzen, P. T. Robinson, et al., pp. 227-244.

Wepfer, W. W., and N. I. Christensen (1991), A seismic velocity-confining pressure relation, with applications, Int. J. Rock Mech. Min. Sci. and Geomech., 28, 451-456.

Wepfer, W. W., and N. I. Christensen (1991), Q structure of the Oceanic Crust, Marine Geophys. Res., 13, 227-237.

Beaudoin, B. C., G. S. Fuis, W. D. Mooney, W. J. Nokleberg, and N. I. Christensen (1992), Thin, low-velocity crust beneath the southern Yukon-Tanana terrane, east central Alaska: Results from Trans-Alaska crustal transect refraction/wide-angle reflection data, J. Geophys. Res., 97, 1921-1942.

Johnston, J. E., and N. I. Christensen (1992), Shear wave reflectivity, anisotropies, Poisson's ratios, and densities of a southern Appalachian Paleozoic sedimentary sequence, Tectonophysics, 210, 1-20.

Holbrook, W. S., W. D. Mooney, and N. I. Christensen (1992), The seismic velocity structure of the deep continental crust, in Continental Lower Crust, Developments in Geotectonics, edited by D. M. Fountain, R. Arculus, and R. M. Kay, pp.1-43, Elsevier, Amsterdam.

Ballotti, D. M., N. I. Christensen, and K. Becker (1992), Seismic properties of serpentinized peridotite from the Mariana forearc, in Proceedings of the Ocean Drilling Program, Scientific Results, 125, College Station, TX (Ocean Drilling Program), edited by P. Fryer, J. A. Pearce, L. B. Stokking, et al., pp. 581-584.

Wallick, B. P., N. I. Christensen, and D. M. Ballotti (1992), High-pressure velocity measurements of Jurassic Basalt, Leg 129, in Proceedings of the Ocean Drilling Program, Scientific Results, 129, College Station, TX (Ocean Drilling Program), edited by R. L. Larson, Y. Lancelot, et al., pp. 501-506.

Szymanski, D. L., and N. I. Christensen (1993), The origin of reflections beneath the Blue-Ridge-Piedmont Allochthon: A view through the Grandfather Mountain window, Tectonics, 12, 265-278.

Seront, B., D. Mainprice, and N. I. Christensen (1993), A determination of the three-dimensional seismic properties of anorthosite: Comparison between values calculated from the petrofabric and direct laboratory measurements, J. Geophys. Res., 98, 2209-2221.

McCaffree, C. L., and N. I. Christensen (1993), Shear wave properties and seismic imaging of mylonite zones, J. Geophys. Res., 98, 4423-4435.

Pratt, T. L., J. F. Mondary, L. D. Brown, N. I. Christensen, and S. H. Danbom (1993), Crustal structure and deep reflector properties: Wide angle shear and compressional wave studies of the midcrustal surrency bright spot beneath southeastern Georgia, J. Geophys. Res., 98, 17, 723-17, 736.

Johnston, J. E., and N. I. Christensen (1993), Compressional to shear velocity ratios in sedimentary rocks, Int. J. Rock Mech. Min. Sci. & Geomech. Abstr., 30, 751-754.

Hughes, S., J. H. Luetgert, and N. I. Christensen (1993), Reconciling deep seismic refraction and reflection data from the Grenvillian-Appalachian boundary in western New England, Tectonophysics, 225, 255-269.

Wilkens, R. H., N. I. Christensen, and J. A. Collins (1993), Seismic properties and reflectivity of north Pacific Ocean cherts, in Proceedings of the Ocean Drilling Program, Scientific Results, 136, College Station, TX (Ocean Drilling Progam), edited by R. H. Wilkens, J. Firth, J. Bender, et al., pp. 99-104.

Miller, D. J., and N. I. Christensen (1994), Seismic signature and geochemistry of an island arc: A multidisciplinary study of the Kohistan accreted terrane, northern Pakistan, J. Geophys. Res., 99, 11, 623-11, 642.

Brocher, T.M., G.S. Fuis, ..., and N. I. Christensen (1994), Mapping the megathrust beneath the northern Gulf of Alaska using wide-angle seismic data, J. Geophys. Res., 99, 11, 663-11, 686.

Mooney, W.D., and N. I. Christensen (1994), Composition of the crust beneath the Kenya rift, Tectonophysics, 236, 391-408.

Johnston, J.E., and N. I. Christensen (1994), Elastic constants and velocity surfaces of indurated anisotropic shales, Surveys in Geophys., 15, 481-494.

Gröschel-Becker, H.M., H.W. Villinger, ..., and N. I. Christensen (1994), Seismic velocities of diabase and basalt from Middle Valley sills and flows, northern Juan de Fuca Ridge, in Proceedings of the Ocean Drilling Program, Scientific Results, 139, College Station, TX (Ocean Drilling Program), edited by M. J. Mottl, E. E. Davis, A. T. Fisher, and J. F. Slack, pp. 597-609.

Fuis, G. S., A. R. Levander, W. J. Lutter, ..., and N. I. Christensen (1995), Seismic images of the Brooks Range, Arctic Alaska, reveal crustal-scale duplexing, Geology, 23, 65-68.

Parsons, T., N. I. Christensen, and H.G. Wilshire (1995), Velocities of southern Basin and Range xenoliths: Insights on the nature of lower crustal reflectivity and composition, Geology, 23, 129-132.

Johnson, J.E., and N. I. Christensen (1995), Seismic anisotropy of shales, J. Geophys. Res., 100, 5991-6003.

Iturrino, G. J., N. I. Christensen, K. Becker, et al. (1995), Physical properties and elastic constants of upper crustal rocks from core-log measurements in hole 504B, in Proceedings of the Ocean Drilling Program, Scientific Results, 137/140, College Station, TX (Ocean Drilling Progam), edited by J. Erzinger, K. Becker, H. J. B. Dick, and L. B. Stokking, pp. 273-291.

Johnston, J. E., G. J. Fryer, and N. I. Christensen (1995), Velocity-porosity relationships of basalts from the East Pacific Rise, in Proceedings of the Ocean Drilling Program, Scientific Results, 142, College Station, TX (Ocean Drilling Program), edited by R. Batiza, M. A. Storms, and J. F. Allan, pp. 51-58.

Okaya, D., N. I. Christensen, D. Stanley, and T.S. Stern (1995), Crustal anisotropy in the vicinity of the Alpine Fault Zone, New Zealand Jour. of Geol. & Geophys., 38(4), 579-583.

N. I. Christensen, and W. D. Mooney (1995), Seismic velocity structure and composition of the continental crust: A global view, J. Geophys. Res., 100, 9761-9788.

N. I. Christensen (1996), Poisson's ratio and crustal seismology, J. Geophys. Res., 101, 3139-3156.

Iturrino, G. J., D. J. Miller, and N. I. Christensen (1996), Velocity behavior of lower crustal and upper mantle rocks from a fast–spreading ridge at Hess Deep, in Proceeding of the Ocean Drilling Program, Scientific Results, Vol. 147, College Station, TX (Ocean Drilling Program), edited by C. Mevel, K. M. Gillis, J. F. Allan, and P. S. Meyer, pp. 417-440.

Salisbury, M.H., N. I. Christensen, and R.H. Wilkens (1996), Nature of the layer 2/3 transition from a comparison of laboratory and logging velocities and petrology at the base of Hole 504B, in Proceedings of the Ocean Drilling Program, Scientific Results, 148, College Station, TX (Ocean Dfrilling Program), edited by J. C. Alt, H. Kinoshita, L. B. Stokking, and P. J. Michael, pp. 409-413.

King, S. D., and N. I. Christensen (1996), Physical properties of rocks, in Encyclopedia of Earth Sciences, edited by E. J. Dasch, MacMillan, New York.

Miller, D. J., G. J. Iturrino, and N. I. Christensen (1996), Geochemical and petrological constraints on velocity behavior of lower crustal and upper mantle rocks from the fast-spreading ridge at Hess Deep, in Proceedings of the Ocean Drilling Program, Scientific Results, 147, College Station, TX (Ocean Drilling Program), edited by C. Mevel, K. M. Gillis, J. F. Allan, and P. S. Meyer, pp. 447-487.

Fuis, G. S., J. M. Murphy, ..., and N. I. Christensen (1997), Deep seismic structure and tectonics of northern Alaska: Crustal-scale duplexing with deformation extending into the upper mantle, J. Geophysical Res., 102, 20, 873-20, 896.

Johnston, J. E., and N. I. Christensen (1997), Seismic properties of layer 2 basalts, Geophys. J. R. Astr. Soc., 128 (2), 285-300.

Stern, T. A., D. Okaya, N. I. Chnstensen et al. (1997), Mountain buildng and active deformation studied in New Zealand, EOS, Trans. Am. Geophys. Un., 78, 32, 329-336.

Miller, D. J., and N. I. Christensen (1997), Seismic velocities of lower crustal and upper mantle rocks from the slow spreading Mid-Atlantic Ridge, south of the Kane Transformation Zone (MARK), in Proceedings of the Ocean Drilling Program, Scientific Results, 153, College Station, TX (Ocean Drilling Program), edited by J. A. Karson, M. Cannat, et al., pp. 437-451.

Musacchio, G., W. D. Mooney, J. H. Luetgert, and N. I. Christensen (1997), Composition of the crust in the Grenville and Appalachian Provinces of North America inferred from Vp/Vs ratios, J. Geophys. Res., 102, 15, 225-15, 241.

Wissinger, E. S., A. Levander, and N. I. Christensen (1997), Seismic images of crustal duplexing and continental subduction in the Brooks Range, J. Geophysical Res., 102, 20, 847-20, 872.

McCaffree-Pellerin, C. L., and N. I. Christensen (1998), Interpretation of crustal seismic velocities in the San Gabriel-Mohave region, southern California, Tectonophysics, 296, 253-271.

Christensen, N. I. (1998), Developments in Petrophysics, Journal of Sedimentary Research, 68, 5, 1054-1055.

Davey, F. J., N. I. Christensen, et al. (1998), Preliminary results from a geophysical study across a modern continent-continent collisional plate boundary –the southern Alps, New Zealand, Tectonophysics, 288, 221-235.

Pan, Y., N. I. Christensen, R. Batiza, and T. L. Coleman (1998), Velocities of a natural mid-ocean ridge basalt glass, Tectonophysics, 290, 171-180.

Parsons, T., N. I. Christensen, et al. (1998), A new view into the Cascadia suduction zone and volcanic arc: Implications for earthquake hazards along the Washington margin, Geology, 26, 211-214.

Tompkins, M. J., and N. I. Christensen (1999), Effects of pore pressure on compressional wave attenuation in a young oceanic basalt, Geophys. Res. Letters, 26, 1321-1325.

Fliedner, M. M., S. Klemperer, and N. I. Christensen (2000), Three-dimensional seismic model of the Sierra Nevada arc, California, and its implications for crustal and upper mantle composition, J. Geophys. Res., 105, 10, 899-10, 922.

Johnston, J. E., and N. I. Christensen (2000), Seismic anisotropy of shales, in Acoustic Velocities in Reservoir Rocks, Recent Developoments, Series 19, v.3, edited by Z.Wang, and A. Nur, pp. 314-326, Society of Exploration Geophysicists.

Soedjatmiko, B., and N. I. Christensen (2000), Seismic anisotropy under extended crust: evidence from upper mantle xenoliths, Cima Volcanic Field, California, Tectonophysics, 321, 279-296.

Long, C., and N. I. Christensen (2000), Seismic anisotropy of South African upper mantle xenoliths, Earth and Planetary Sci. Lett., 179, 551-565.

Godfrey, N. J., N. I. Christensen, and D. A. Okaya (2000), Anisotropy of schists: Contribution of crustal anisotropy to active source seismic experiments and shear wave splitting observations, J. Geophys. Res., 105, 27, 991-28, 007.

Christensen, N. I., L. G. Medaris Jr., H. F. Wang, and E. Jelnek (2001), Depth variation of seismic anisotropy and petrology in central European lithosphere: A tectonothermal synthesis from spinel lherzolite, J. Geophys. Res., 106, 645-664.

Zhao, Z., N. I. Christensen, and W. Zhou (2001), Elastic wave velocity in rocks from Dabieshan and its constraints for lithospheric composition and crust-mantle recycling, Progress in Natural Science (China), 11, 116-122.

Tompkins, M. J., and N. I. Christensen (2001), Ultrasonic P- and S-wave attenuation in oceanic basalt, J. Geophys. Int., 145, 172-186.

Meltzer, A., and N. I. Christensen, Nanga Parbat (2001), Crustal anisotropy: Implications for interpretation of crustal velocity structure and shear-wave splitting, Geophys. Res. Lett., 28, 2129-2132.

Brocher, T. M., and N. I. Christensen (2001), Density and velocity relationships for digital sonic and density logs from coastal Washington and laboratory measurements of Olympic Peninsula mafic rocks and greywackes, USGS Open-File Report 01-264. 39, 1-30.

Brocher, T. M., T. Parsons, R. J. Blakely, N. I Christensen et al. (2001), Upper crustal structure in Puget Lowland, Washington: Results from the 1998 seismic hazards investigation in Puget Sound, J. Geophys. Res. 106, 13, 541-13, 564.

Stanley, D., and N. I. Christensen (2001), Attenuation anisotropy in shale at elevated confining pressure, Int. J. Rock Mech. and Min. Sci., 28, 1047-1056.

Christensen, N. I. (2002), Continental mantle seismic anisotropy: A new look at the Twin Sisters massif, Tectonophysics, 355, 163-170.

Okaya, D., and N. I. Christensen (2002), Anisotropic effects of non-axial seismic wave propagation in foliated crustal rocks, Geophys. Res. Letts. 10, 2, 1-4, doi: 10.1029/2001GL014285.

Godfrey, N. J., N. I. Christensen, and D. A. Okaya (2002),The effect of crustal anisotropy on reflector depth and velocity determination from wide-angle seismic data: A synthetic example based on South Island, New Zealand, Tectonophysics, 355, 145-161.

Morozov, I. B., N. I. Christensen, S. B. Smithson, and L. S. Hollister (2003), Seismic and laboratory constraints on crustal formation in a former continental arc, (ACCRETE, southeastern Alaska and western British Columbia) J. Geophys. Res. VOL. NO. 08, B1, 2041, doi:10.1029/2001JB001740.

Christensen, N. I., and D. Stanley (2003). Seismic Velocities and densities of rocks, in International Handbook of Earthquake and Engineering Seismology, edited by W. Lee, H. Kanamori, P. Jennings, and C. Kissinger, 1587-1594, Academic Press.

Courtier A. M., D. J. Hart, and N. I. Christensen. (2004), Seismic properties of Leg 195 serpentinites and their geophysical implications. In Proc. ODP, Sci. Results, 195 , edited by M. Shirohara, M. H. Salisbury, and C. Richter.

Christensen, N. I. (2004), Serpentinites, peridotites, and seismology, International Geology Review, vol. 46, p. 795-816.

Kopylova, M. G., J. Lo, and N. I. Christensen (2004), Petrological constraints on seismic properties of the slave upper mantle (Northern Canada). Lithos, vol. 77, 493-510.

Lutter, W. J., G. S. Fuis, N. I. Christensen, et. al. (2004), Upper Crustal structure from the Santa Monica Mountains to the Sierra Nevada, Southern California: Tomographic results from the Los Angeles regional Seismic experiment, phase II (LARSE II). Bull. Seismological Soc. Am., vol. 94, 619-632.

Brocher, T. M., G. S. Fuis, W. J. Lutter, N. I. Christensen, and N. A. Ratchkovski (2004), Seismic velocity models for the Denali Fault zone along the Richardson Highway, Alaska. Bull. Seismological Soc. Am., v. 94, S85-S106.

T. Parsons, R. J. Blakely, T. M. Brocher, N. I. Christensen, et al. (2006), Crustal Structure of the Cascadia Fore Arc of Washington, U. S. Geological Survey Professional Paper, 1661-D, 1-40.

Kobussen A. F., N. I. Christensen, and H. Thybo (2006), Constraints on seismic velocity anomalies beneath the Siberian craton from xenoliths and petrophysics, Tectonophysics (425), 123-135.

Christensen, N. I., D. A. Okaya (2007), Compressional and Shear Wave Velocities in South Island, New Zealand rocks and their application to the interpretation of seismological models of the New Zealand crust, A Continental Plate Boundary: Tectonics at South Island, New Zealand Geophysical Monograph Series 175, American Geophysical Union, 123-155, doi: 10.1029/175GM08.

Fuis, G. S., T. E. Moore, ..., N. I. Christensen, A. R. Levander, et al. (2008), Trans-Alaska Crustal Transect and continental evolution involving subduction underplating and synchronous foreland thrusting, Geology, (36), 267-271, doi: 10.1130/G24257A.1.

Audet, P., M. G. Bostock, N. I. Christensen, and S. M. Peacock (2009), Seismic evidence for overpressured subducted oceanic crust and megathrust fault sealing, Nature, 457, 76-78, doi: 10.1038/nature07650.

Zhao, Z., Y. Niu, N. I. Christensen, W. Zhou, et al. (2011), Delamination and ultra-deep subduction of continental crust: constraints from elastic wave velocity and density measurement in ultrahigh-pressure metamorphic rocks, Journal of Metamorphic Geology, 1-21, doi:10.1111 fl.1525-1314.2011.00941.x.

Peacock, S. M., N. I. Christensen, M. G. Bostock, and P. Audet (2011), High pore pressures and porosity at 35 km depth in the Cascadia subduction zone, Geology, 470-474, doi: 10.1130/G31649.1.

Ullemeyer K., D. I. Nikolayev, N. I. Christensen, and J. H. Behrmann (2011), Evaluation of intrinsic velocity-pressure trends from low-pressure P-wave velocity measurements in rocks containing microcracks, Geophys. J. Int., 185, 1312-1320, doi: 10.1111/j.1365-246X.2011.05008.x.

Christensen, N. I., Seismic Properties of Rocks (2011), in Encyclopedia of Solid Earth Geophysics, edited by H. K. Gupta, doi: 10.1007/978-90-481-8702-7

Bostock, M. G., and N. I. Christensen (2012), Split from slip and schist: Crustal anisotropy beneath northern Cascadia from non-volcanic tremor, J. Geophys. Res., 117, B08303, doi:10.1029/2011JB009095.

Gorbatsevich, F. F., O.S. Gotovataya, V.L. Rchenko, Y.P. Smimov, H. Kern, T. Popp, S. Smithson, E. Ai, and N.I. Christensen (2012), Elastic properties of Kola overdeep borehole (SG-3) samples determined under atmospheric and in situ conditions, Ivestiya—Physics of the Solid Earth, 38 (7), 576-584.

Hansen, Ralf T.J., M.G. Bostock, N. I. Christensen (2012), Nature of the low velocity zone in Cascadia from receiver function waveform inversion, Earth and Planetary Science Letters, 337-338, 25-38

Matharu, G., M. G. Bostock, N.I Christensen, and J. Tromp (2014) , Crustal anisotropy in a subduction zone forearc: Northern Cascadia, J. Geophys. Res., 119, doi: 10.1002/2014 JB011321.

Ferre, E. C., A. Gebelin, J. A. Conder, N. I. Christensen , J. D. Wood, and C. Teyssier (2014), Seismic anisotropy of the Archean crust in the Minnesota River Valley, Superior Province, Geophys. Res. Lett., 41, doi: 10.1002/2013 GL 059116.

Postlethwaite, B., Bostock, M. G., Christensen, N. I., and D. B. Snyder (2014), Seismic velocities and composition of the Canadian crust, Tectonophysics, 633, 256 - 267.

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