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Pacific Northwest Geologic Mapping and Urban Hazards

The Pacific Northwest Urban Corridor Geologic Mapping Project abstracts

Anderson, M.L., Blakely, R.J., Brocher, T.M., Pratt, T.L., Wells, R.E., Haugerud, R., and Bush, M., 2006, Structure of the Seattle uplift from seismic, gravity, magnetic, geologic, and geomorphic data [abstract]:  EOS Transactions of the American Geophysical Union, v. 87, Fall Meeting Supplement, Abstract T41A-1554.

Bakun, W.H., Haugerud, R.A., Hopper, M.G., and Ludwin, R.S., 2001, The December 1872 Washington State earthquake, Seismological Research Letters, v.72, p. 269.

Barnett, E.A., Kelsey, H.M., Sherrod, B.L., Blakely, R.J., Hughes, J.F., Schermer, E.R., Haugerud, R.A., Weaver, C.S., and Siedlecki, E., 2006, Active faulting at the northeast margin of the greater Puget Lowland [abstract]:  A paleoseismic and magnetic-anomaly study of the Kendall scarp, Whatcom County, northwest Washington:  EOS Transactions of the American Geophysical Union, v. 87, Fall Meeting Supplement, Abstract S31A-0183.

Barnett, E.A., Kelsey, H.M., Sherrod, B., Hughes, J., Schermer, E., Haugerud, R., Weaver, C., Siedlecki, E., and Blakely, R., 2007, Active faulting at the northeast margin of the greater Puget Lowland:  A trenching and wetland coring study of the Kendall fault scarp, Whatcom County, Northwest Washington [abstract]:  Geological Society of America Abstracts with Program, 2007 Annual Meeting of the Cordilleran Section, Bellingham, Washington, May 2007.

Blakely, R.J., Scholl, D.W., Wells, R.E., von Huene, R., and Barckhausen, U., 2006, Using satellite gravity to map and model forearc basins and thickness of trench sediment worldwide:  Implications for great earthquakes [abstract]:  EOS Transactions of the American Geophysical Union, v. 87, Fall Meeting Supplement, Abstract T51F-06.

Blakely, R., Barckhausen, U., Scholl, D., von Huene, R., Wells, R., 2006, Using satellite gravity to map and model forearc basins and thickness of trench sediment worldwide:  Lessons from Central America:  U.S. Geological Survey Tsunami Sources Workshop 2006, Great Earthquake Tsunami Sources, Empiricism and Beyond, April 21-22, proceedings on CD-ROM, p. 10.

Blakely, R.J., Sherrod, B.L., Wells, R.E., and Weaver, C.S., 2004, Finding active faults in a glaciated and forested landscape: the southern Whidbey Island fault, Washington:  American Geophysical Union 2004 Fall Meeting Program and Abstracts, G44A-01.

Blakely, R.J., Brocher, T.M., and Wells, R.E., 2003, Subduction zone magnetic anomalies:  Implications for mapping hydrated forearc mantle beneath Cascadia:  Geological Society of America Annual Meeting, Abstracts with Programs, Seattle, Washington, November 2-5, 2003, p. 308.

Blakely, R.J., and Wells, R.E., 2003, High-resolution aeromagnetic data facilitate mapping and characterization of Cascadia earthquake hazards:  IUGG 2003 Scientific Program and Abstracts, Sapporo, Japan, June 30-July 11, 2003, abstract GAV.06/10A/A11-001, p. B.258.

Blakely, R.J., Weaver, C.S., Sherrod, B.L., Troost, K.G., Haugerud, R.A., Wells, R.E., and McCormack, D.H., 2003, The Cottage Lake lineament, Washington:  Onshore extension of the southern Whidbey Island fault?:  American Geophysical Union, 2003 Fall Meeting Program and Abstracts, S42A-0149.

Blakely, R.J., Wells, R.E., Weaver, C.S., and Meagher, K.L., 2001, Cascadia earthquakes and forearc blocks , Seismological Research Letters, v. 72, p. 238.

Blakely, R.J., and Brocher, T.M., 2000, How the Jell-O shakes depends on the shape of the bowl: a three-dimensional view of the Seattle basin, [abs.], in Cascadia Quakes, a Tricentennial Exposition: U.S. Geological Survey, University of Washington, Burke Museum of Natural History and Culture, p. 15.

Blakely, R.J., Brocher, T.M., Parsons, T.E., Langenheim, V.E., and ten Brink, U.S., 2000, The Seattle basin: a three-dimensional geologic model based on density and seismic velocity , 2000 Abstracts with Program, 96th Annual Meeting of the Cordilleran Section, Geological Society of America, April, 2000, p. A-4.

Blakely, R.J., Brocher, T.M., Parsons, T.E., Langenheim, V.E., and ten Brink, U.S., 2000, The Seattle basin: a three-dimensional geologic model based on density and seismic velocity [abs.], 2000 Abstracts with Program, 96th Annual Meeting of the Cordilleran Section, Geological Society of America, April, 2000, p. A-4.

Blakely, R.J., Parsons, T.E., Brocher, T.M., Langenheim, V.E., and ten Brink, U.S., 1999, A three-dimensional view of the Seattle basin, Washington, from gravity inversion and seismic velocity, EOS, Transactions of the American Geophysical Union, v. 80, p. F762

Blakely, R.J., Parsons, T.E., Brocher, T.M., Langenheim, V.E., and ten Brink, U.S., 1999, A three-dimensional view of the Seattle basin, Washington, from gravity inversion and seismic velocity [abs.]:, EOS, Transactions of the American Geophysical Union, v. 80, p. F762.

Blakely, R.J., Wells, R.E., Weaver, C.S., and Johnson, S.Y., 1999, Tectonic setting and earthquake hazards of the Seattle fault, Washington: Implications from high-resolution aeromagnetic data, Seismological Research Letters, v. 70, p. 219.

Blakely, R.J., Wells, R.E., and Finn, C., 1998, Geometry and deformation of the Cascadia forearc: Implications from high-resolution aeromagnetic surveys and gravity measurements [abstract], Abstracts, Western Pacific Geophysics Meeting, Taipei.

Blakely, R.J., Wells, R.E., Haugerud, R.A., Pratt, T., and Weaver, C.S., 1998, Geometry and deformation of the Cascadia forearc: Implications from a new high-resolution aeromagnetic survey of the Puget Lowland, Washington [abstract], EOS, Transactions of the American Geophysical Union, v. 79, p. F873.

Blakely, R.J., Wells, R.E., Weaver, C.S., Johnson, S.Y., and Dadisman, S.V., 1998, Structure and seismicity of the Seattle fault, Washington, EOS, Transactions of the American Geophysical Union, v. 79, p. F874.

Blakely, R.J., Cruikshank, K., Johnson, A., Beeson, M., Walsh, K., and Wells, R.E., 1997, A gravity study through the Tualatin Mountains, Oregon: Understanding crustal structure and earthquake hazards in the Portland urban area [abstract], 1997 Abstracts with Program, Cordilleran Section, Geological Society of America, v. 29, p. 5

Blakely, R.J., Wells, R.E., Yelin, T.S., Dougherty, M.E., and Trehu, A.M., 1996, Faults and earthquakes in the Willamette Valley and Portland basin: A regional perspective from newly acquired aeromagnetic data [abstract], 1996 Abstracts with Programs, 92nd Annual Meeting of the Cordilleran Section, Geological Society of America, Portland, Oregon, April, 1996, p. 50.

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Booth, D.B. and Troost, K.G., 1998, Chronology, correlation, and deformation of Quaternary deposits in the central Puget Lowland, Washington State, Association of Engineering Geologists, Program with Abstracts, Annual Meeting, Seattle, WA, Sept 30-Oct 3, p. 79.

Booth, D.B., and Troost, K.G., 1998, Tectonic deformation of Pleistocene deposits in the central Puget Lowland, Washington State, Abstracts with Programs, Annual Meeting, Toronto, Canada, Oct. 26-29, v. 30, No. 7, A-74.

Booth, D.B., Troost, K.G., and Hagstrum, J.T., 1999, Character and age of tectonically deformed Pleistocene deposits in the central Puget Lowland, Washington state, Seismological Research Letters, v. 70, no. 2, p. 234.

Booth, D.B., Troost, K.G., Hagstrum, J.T., Blakely, R.J., and Thorson, R.B., 2000, Geologic evaluation of tectonic deformation in the central Puget Lowland, Washington State, 2000 Abstracts with Program, 96th Annual Meeting of the Cordilleran Section, Geological Society of America, April, 2000, A-5.

Booth, D.B., Troost, K.G., Hagstrum, J.T., Blakely, R.J., and Thorson, R.B., 2000, Geologic evaluation of tectonic deformation in the central Puget Lowland, Washington State, 2000 Abstracts with Program, 96th Annual Meeting of the Cordilleran Section, Geological Society of America, April, 2000, A-5.

Booth, D.B., Wells, R.E., Givler, R., DuRoss, C., Blakely, R.J., Meeks, E., Ebel, K., Fryer, J., Troost, K., Booth, R., Barnett, E., Crider, J., and Gregorie, P., 2001, Chimney damage patterns in the greater Seattle area from the Nisqually earthquake of February 28, 2001 , Seismological Research Letters, v. 72, p. 395.

Brocher, T.M., Blakely, R.J., and Wells, R.E., 2003, Reinterpretation of the Seattle uplift, Washington, as a passive roof duplex:  Geological Society of America Annual Meeting, Abstracts with Programs, Seattle, Washington, November 2-5, 2003, p. 478.

Brocher, T.M., Blakely, R.J., Wells, R.E., 2003, Interpretation of the Seattle uplift, Washington, as a passive roof duplex:  American Geophysical Union, 2003 Fall Meeting Program and Abstracts, S42I-06.

Brocher, T.M., Blakely, R.J., Fisher, M.A., Wells, R.E., and Christensen, N.I., 2000, Evidence for the Tacoma fault in the Puget Lowland, Washington: results form the 1998 Seismic Hazards Investigation in Puget Sound (SHIPS) , Supplement to EOS, Transactions of the American Geophysical Union, v. 81, p. 871.

Brocher, T.M., Parsons, T., Blakely, R.J., Wells, R.E., Fisher, M.A., 2001, New insights on crustal faults in the Puget Lowland, Washington, from SHIPS, gravity, and aeromagnetic surveys , Seismological Research Letters, v. 72, p. 238.

Brocher, T.M., Parsons, T., Fisher, M.A., Blakely, R.J., Jachens, R.C., and Wentworth, C.M., 2001, Strategies for building regional crustal velocity models: Examples from the San Francisco Bay area and Puget Lowland, Seismological Research Letters, v. 72, p. 278.

Brocher, T.M., Parsons, T., Fisher, M.A., Blakely, R.J., ten Brink, U.S., Creager, K.C., Crosson, R.S., Miller, K.C., Trehu, A.M., Spence, G., Zelt, B.C., Hyndman, R.D., and Mosher, D.C., 1999, Structure of the Puget lowland: a tomographic model using data from the 1998 Seismic Hazards Investigation in Puget Sound (SHIPS) experiment [abs.]: , EOS, Transactions of the American Geophysical Union, v. 80, p. F749.

Brocher, T.M., Parsons, T., Fisher, M.A., Blakely, R.J., ten Brink, U.S., Creager, K.C., Crosson, R.S., Miller, K.C., Trehu, A.M., Spence, G., Zelt, B.C., Hyndman, R.D., and Mosher, D.C., 1999, Structure of the Puget lowland: a tomographic model using data from the 1998 Seismic Hazards Investigation in Puget Sound (SHIPS) experiment, EOS, Transactions of the American Geophysical Union, v. 80, p. F749.

Brocher, T.M., Parsons, T., Fisher, M.A., Blakely, R.J., ten Brink, U.S., Creager, K.C., Crosson, R.S., Miller, K.C., Trehu, A.M., Spence, G., Zelt, B.C., Hyndman, R.D., and Mosher, D.C., 2000, Internal structure of Cenozoic basins in the Puget Lowland, Washington: Results from SHIPS, the 1998 Seismic Hazards Investigation in Puget Sound:, 2000 Abstracts with Program, 96th Annual Meeting of the Cordilleran Section, Geological Society of America, April, 2000, p. A-6.

Brocher, T.M., Parsons, Tom., Blakely, R.J., Wells, R.E., Fisher, M.A., and the SHIPS Working Group, 2001, New insights on crustal faults in the Puget lowland, Washington from the SHIPS, gravity, and aeromagnetic surveys, Seismological Research Letters, v. 72, p. 238.

Butler, R., Bishop, E., Ault, C., Jr., Atwater, B., Magura, B., Hedeen, C., Blakely, R., Wells, R., Shay, K., Wagner, R., Southworth-Neumeyer, T., and Connor, D., 2006, Linking middle-school teachers to EarthScope:  EOS Transactions of the American Geophysical Union, v. 87, p. 257.

Champion, D., Hagstrum, J.T., Hoblitt, R., and Gardner, C., 1999, History of Holocene geomagnetic secular variation in the western United States compiled from volcanic rock sources, EOS, American Geophysical Union, Transactions, v. 80, p. F284.

Chan, K.J., Gaylord, D.R., O’Connor, J.E., and Foit, F.F. Jr., 2007, History of Pleistocene and Holocene volcaniclastic sedimentation in the Cowlitz River valley, southwestern Washington State, Geological Society of America Abstracts with Programs, v. 39, no. 4, p. 24-25.

Chan, Krystal, O’Connor, J., Gaylord, D.R., and Foit, F.F. Jr., 2006, The effect of Mount St. Helens volcanism on sedimentation in the Cowlitz River, southwest Washington State, Geological Society of America Abstracts with Programs, v. 38, no. 7, p. 72.

Clynne, M.A., Wolfe, E.W., Calvert, A.T., Pallister, J.P., Champion, D.E., Lanphere, M.A, and Evarts, R.C., Eruptive history of Mount St. Helens, Washington — a summary with new data [abs.] 2005, Geochimica et Cosmochimica Acta, v. 69A, p. A270.

Conlon, T.D. Wozniak, K.C., Lee, K.K., and O’Connor, J.E., 2003, The effect of Quaternary stratigraphy on ground water and surface water resources, Willamette Valley, Oregon, Geological Society of America Abstracts with Programs, v. 35, no. 6, p. 488.

Conrey, R.M., Evarts, R.C., and Fleck, R.F., 2005, Location of the Miocene—Pleistocene Cascade volcanic front in the Portland Basin [abs.]: Geochimica et Cosmochimica Acta, v 69A, p. A267.

Conrey, R.M., Evarts, R.C., Leeman, W.P., Streck, M.J., Smith, R., and Fleck, R.J., 2007, A petrologic overview of the Boring Volcanic Field, Cascade Range, USA: Geological Society of America Abstracts with Program, v. 39, no. 4, p. 29.

Conrey, R.M., Leeman, W.P., Streck, M.J., and Evarts, R.C., 2003, The Boring Volcanic Field of the Portland Basin: Diverse primitive mafic magmas erupted in a frontal arc setting [abs.]: Eos, Transactions American Geophysical Union, v. 84, p. F1552-F1553.

Cox, Brett F., Mahan, Shannon A., and Thoms, Evan, 2003, Geologic quadrangle mapping and studies of Quaternary stratigraphy in the Puget Lowland near Edmonds, Washington [abs.], Geological Society of America Abstracts with Programs, v. 35, no. 6, p. 80

Crider, J.G., Schermer, E.R., and Haugerud, R.A., 2001, Liquefaction of the Issaquah Creek delta, during Sherrod, B.L., Haeussler, P.J., Wells, R., Troost, K., and Haugerud, R., 2001, Surface rupture in the Seattle fault zone near Bellevue, Washington: Seismological Research Letters, v. 72, p. 394.

Dethier, D.P., Dragovich, J., Sarna-Wojcicki, A.M., and Fleck, R.J., in press, Interglacial pumice in Whidbey Formation at Blowers Bluff, central Whidbey Island, Washington:  Quaternary International, v.__, p.__.

Dinterman, P.A., and Evarts, R.C., 2003, Progress in geologic mapping of the Portland Basin, Oregon and Washington [abs.]: Geological Society of America Abstracts with Program, v. 35, no. 6, p. 76.

Dougherty, M.E., Trehu, A.M., Liberty, L.M., and Blakely, R.J., 1995, Shallow seismic imaging of the Gales Creek/Mt. Angel fault system Willamette Valley, Oregon [abstract], EOS, Transactions of the American Geophysical Union, v. 76, p. F391.

Dougherty, M.E., Trehu, A.M., Liberty, L.M., and Blakely, R.J., 1996, Shallow seismic imaging of the Mount Angel/Gales Creek fault system, Willamette Valley, Oregon [abstract], 1996 Abstracts with Programs, 92nd Annual Meeting of the Cordilleran Section, Geological Society of America, Portland, Oregon, April, 1996, p. 62.

duBray, E.A., John, D.A., Sherrod, D.R., Evarts, R.C., Conrey, R.M., and Lexa, J., 2006, Geochemical database for volcanic rocks of the Western Cascades, Washington, Oregon, and California: U.S. Geological Survey Data Series 155, 1 CD-ROM, with accompanying 49-p. pamphlet.

Evarts, R.C., 2007, Neogene evolution of the Portland Basin [abs.]: Geological Society of America Abstracts with Program, v. 39, no. 4, p. 28. Evarts, R.C., 2005, The Cascade volcanic arc of southwestern Washington — the early years [abs.]: Geochimica et Cosmochimica Acta, v. 69A, p. A274.

Evarts, R.C., Clynne, M.A., Fleck, R. J., Lanphere, M.A., Calvert, A.T., and Sarna-Wojcicki, A.M., 2003, The antiquity of Mount St. Helens and age of the Hayden Creek Drift [abs.]: Geological Society of America Abstracts with Program, v. 35, no. 6, p. 8.

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Fisher, M.A., Ratchkovski, N., Wells, R.E., Eberhart-Phillips, D., Blakely, R.J., and Geist, E.L., 2005, Seismotectonics of the rupture zone of the 1964 Mw=9.2 Great Alaska Earthquake: Geological Society of America, 2005 Abstracts with Programs, Cordilleran Section Meeting, San Jose, California, p. 44. 

Fisher, M.A., Brocher, T.M., Parsons, T., Crosson, R.S., Creager, K.C., Trehu, A.M., Mosher, D.L., Hyndman, R.L., Blakely, R.J., and others, 1999, Results from the 1998 SHIPS experiment, regarding urban earthquake hazards in Cascadia , EOS, Transactions of the American Geophysical Union, v. 80, p. F762.

Fisher, M.A., Calvert, A.J., Parsons, Tom, Wells, R.E., Brocher, T.M., Weaver, C.S., and the SHIPS Working Group , 2000, Crustal structure from SHIPS seismic reflection data along a transect from the southern Puget Lowland north to the San Juan Islands, Supplement to EOS, Transactions of the American Geophysical Union, v. 81, p. 878.

Glen, J., and Blakely, R., 2007, Geophysical domains of the Oregon arc and backarc and their tectonic significance [abstract]:  Geological Society of America Abstracts with Program, 2007 Annual Meeting of the Cordilleran Section, Bellingham, Washington, May 2007.

Haeussler, Peter J., Wells, Ray, Friedman, Richard, Wooden, Joseph, Bukry, David, and Snavely, Parke D. Jr, 2003, U-Pb and coccolith ages from the Oregon Coast Range - hooking Siletzia up to the Geomagnetic Polarity Time Scale, Geological Society of America Abstracts with Programs, v. 35, no. 6, Abst 209-6.

Haeussler, P.J., Wells, R., Blakely, R.J., Murphy, J., Wooden, J., 2000, Constraints on structure and timing of movement of the Seattle fault from structural geology, geophysics, and geochronology of the Green and Gold Mountains igneous complex, Washington [abs.], 2000 Abstracts with Program, 96th Annual Meeting of the Cordilleran Section, Geological Society of America, April, 2000, p. A-16.

Hagstrum, J.T., Wells, R.E., Evarts, R.C., Blakely, R.J., and Beeson, M.H., 2007, Vertical-axis rotations within 15.6-12 Ma Columbia River basalt flows define a sharp eastern boundary of the Coast Range block in northwestern Oregon [abstract]:  Geological Society of America Abstracts with Program, 2007 Annual Meeting of the Cordilleran Section, Bellingham, Washington, May 2007.

Hagstrum, J.T., Wells, R.E., Evarts, R.C., Blakely, R.J., and Beeson, M.H., 2006, Vertical-axis rotations within Columbia River basalt flows define a sharp eastern boundary of the Coast Range block with potentially increased seismic risk for Portland, Oregon [abstract]:  EOS Transactions of the American Geophysical Union, v. 87, Fall Meeting Supplement, Abstract GP11A-0058.

Hagstrum, J.T., R.E. Wells, R.C. Evarts, R.J. Blakely, and M.H. Beeson, 2006, Vertical-Axis Rotations Within Columbia River Basalt Flows Define a Sharp Eastern Boundary of the Coast Range Block with Potentially Increased Seismic Risk for Portland, Oregon [abstr.], EOS, American Geophysical Union, Transactions, v. 87.

Hagstrum, J. T., R. E. Wells, R. C. Evarts, R. J. Blakely, and M. H. Beeson, 2006.  Vertical-axis rotations within 15.5-12 Ma Columbia River Basalt flows define a sharp eastern boundary of the Coast Range block in northwestern Oregon [abstr.], Abstracts with Programs, Geological Society of America, v. 39, p. 29.

Hagstrum, J.T., 2004, Antipodal hotspots, large igneous provinces, and sea-level changes: Vestiges of oceanic large-body impacts? Abstracts with Programs, Geological Society of America, v. 36, p. 207. [invited] Hagstrum, J.T., 2004, Antipodal hotspots and bipolar catastrophes: Were oceanic large-body impacts to blame? EOS, American Geophysical Union, Transactions, v. 85, p. F1925.

Hagstrum, J.T., Wells, R.E., Blakely, R.J., Beeson, M.H. Tolan, T.L., and Wheeler, K.L., 2003, Magnetostratigraphic and geologic mapping of the Columbia River basalt aquifer in the northern Willamette Valley:  Geological Society of America Annual Meeting, Abstracts with Programs, Seattle, Washington, November 2-5, 2003, p. 76.

Hagstrum, J.T., Mahan, S.A., Troost, K.G., and Booth, D.B. (2003) Magnetostratigraphy, optical dating, and vertical deformation of Pleistocene deposits in the south central Puget Lowland [abstr.], Abstracts with programs, GSA Annual Meeting, v. 35, p. 79.

Hagstrum, J. T., D. B. Booth, and K. G. Troost, 2000, Magnetostratigraphy and paleomagnetic correlation of Pleistocene deposits in the central Puget lowland, Washington, Geological Society of America, Abstracts with Programs, v. 32, p. A-16.

Haugerud, R.A., 2005, Geologic map of Bainbridge Island, Washington: U.S. Geological Survey Open-file Report, scale 1:24,000.

Haugerud, R. A., and Thoms, E. E., 2004, Geologic Data Assistant (GDA): An ArcPad Extension for Geologic Mapping, in Soller, D.R., ed., 2004, Digital Mapping Techniques '04 -- Workshop Proceedings: U.S. Geological Survey Open-file Report 2004-1451.

Haugerud, R.A., 2000, A synoptic view of Vashon glaciation: The map, Geological Society of America Abstracts with Programs, v. 32, n. 6, p. A_.

Haugerud, R.A., 2001, Mapping earth surfaces with digital topography: Experiences with LIDAR and conventional DEMs, Fifth International Conference on Geomorphology, Tokyo__

Haugerud, R.A., 2001, Seeing time and tectonics in the topography of the Puget Lowland, Fifth International Conference on Geomorphology, Tokyo__.

Haugerud, R.A., Thomas, G., Palmer, S.P., and Lombard, P., 2001, Regional map view of instrumentally-determined ground motions, Nisqually earthquake of 28 February 2001, Seismological Research Letters, v. 72, p. 393.

Haugerud, R.A., Troost, K.G., Harp, E.L., Wegmann, K.W., Sherrod, B.L., Pratt, T.L., and Kramer, S.L., 2001, Regional map view of ground deformation associated with the Nisqually earthquake, 28 February 2001, Seismological Research Letters, v. 72, p. 393.

Haugerud, R.A., Weaver, C.S., and Harless, J., 2001, Finding faults with LIDAR in the Puget Lowland, Seismological Research Letters, v. 72, p. 253.

Haugerud, R.A., and Booth, D.B., 2000, A synoptic view of Vashon glaciation: The movie, Geological Society of America Abstracts with Programs, v. 32, n. 6, p. A_.

Haugerud, R.A., 1998, Preliminary report on significant thrusting and extension of the early Tertiary Chuckanut Formation, NW Washington, Slave-NORthern Cordillera Lithospheric Evolution (SNORCLE) and Cordilleran tectonics workshop: Lithoprobe Report, University of British Columbia, Secretariat [for the] Canadian Lithoprobe Program, Vancouver, BC, p. 203.

Haugerud, R.A., 1997, Flexible map production from a composite geologic-map database, Geological Society of America Abstracts with Programs, v. 29, n. 6, p. A-306. Haugerud, R.A., 1997, The North American Cordillera: A map for the study of active tectonics, Geological Society of America Abstracts with Programs, v. 29, n. 5, p. 19.

Haugerud, R.A., and Tabor, R.W., 1997, Fast, easy, and accurate digital geologic maps: a composite map of the North Cascades, Washington, Geological Society of America Abstracts with Programs, v. 29, n. 6, p. A-306.

Haugerud, R.A., Schuster, J.E., Booth, D.B., and Sacket, J., 1997, Progress towards a digital composite geologic-map database for the Puget Lowland, Abstract volume, 2nd Symposium on the Hydrogeology of Washington State, Evergreen State College, Olympia, Washington, August 23, 1997, p. 55.

Haugerud, R.A., 1996, Digital topographic-bathymetric map of Cascadia (39°N-53°N, 116°W-133°W), Geological Society of America Abstracts with Programs, v. 28.

Hillhouse, J. W., and Wells, R.E., 1999, Paleomagnetism of Miocene volcanic rocks in the Newberry Mountains, California: vertical axis rotation and a polarity transition, Supplement to EOS, Transactions of the American Geophysical Union, v 80, p. 286.

Howard, K.A., Haugerud, R.A., and Blakely, R.J., 2000, Neotectonics of the Portland basin: possible uplift and offset of latest Pleistocene Missoula flood deposits near Battle Ground, Washington , [abs.]: 2000 Abstracts with Program, 96th Annual Meeting of the Cordilleran Section, Geological Society of America, April, 2000, v. 32, n. 6, p. A-20.

Johnson, Samuel Y., Nelson, Alan R., Personius, Stephen F., Wells, Ray E., Kelsey, Harvey M., Sherrod, Brian L., Okumura, Koji, Koehler, Richard III, Witter, Robert C., and Bradley, Lee-Ann, 2003, Evidence for one or two late Holocene earthquakes on the Utsalady Point fault, northern Puget Lowland, Washington, Geological Society of America Abstracts with Programs, v. 35, no. 6, Abst. 197-11.

Johnson, S.Y., Dadisman, S.V., Childs, J.R., Stanley, W.D., Bucknam, R.C., Haugerud, R.A., 1996, The Seattle Fault is offset by two active dextral strike-slip faults in Puget Sound, Washington; implications for earthquake hazards, Geological Society of America Abstracts with Programs, v. 28 n. 7, p. 415.

Johnson, S.Y., Dadisman, S.V., Mosher, D.C., Blakely, R.J., and Childs, J.R., 2000, Late Quaternary tectonics of the Devils Mountain fault and related structures, northern Puget Lowland, 2000 Abstracts with Program, 96th Annual Meeting of the Cordilleran Section, Geological Society of America, April, 2000, p. A-21.

Johnson, S.Y., Dadisman, S.V., Mosher, D.C., Blakely, R.J., Childs, J.R., and Rhea, S.B., 1999, Neotectonics of the Devils Mountain fault and northern Whidbey Island fault, eastern Strait of Juan de Fuca and northern Puget Lowland, Washington, Seismological Research Letters, v. 70, p. 220.

Johnson, S.Y., Dadisman, S.V., Mosher, D.C., Blakely, R.J., Childs, J.R., and Wells, R.E., 1998, Neotectonics of the eastern Strait of Juan de Fuca region, northwestern Washington and southwestern British Columbia [abstract], EOS, Transactions of the American Geophysical Union, v. 79, p. F897.

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Langenheim, V.E., McPhee, D.K., Morin, R.L., Blakely, R.J., and Wells, R.E., 2004, A three-dimensional view of the Tualatin and northern Willamette basins, Oregon, from inversion of new gravity data:  American Geophysical Union Fall Meeting Program and Abstracts, T33C-1392.

Lanphere, M.A., Champion, D.E., Christiansen, R.L., Donnelly-Nolan, J.M., Fleck, R.J., Sarna-Wojcicki, A.M., Obradovich, J.D., and Izett, G.A., 1999, Evolution of tephra dating in the western United States [abstract], Geol. Soc. America, Abstracts With Programs, v. 31, no. 6, p. 73.

Leeman, W.P., Evarts, R.C., Conrey, R.M., and Streck, M.J., 2003, Mafic magmatism and new perspectives on Cascadia subduction [abs.]: Geological Society of America Abstracts with Program, v. 35, no. 6, p. 643.

Leung, I. S., and J. T. Hagstrum, 2006, Distal impact ejecta material in marine sediments in the north-central Pacific Ocean [abstr.], EOS, American Geophysical Union, Transactions, v. 87.

Liberty, L.M., Blakely, R., Wells, R., Niem, A.R., 2003,. Tectonic characterization of a 150 km transect of the Columbia River, western Oregon and Washington, as characterized by seismic reflection, aeromagnetic, and geologic map data:  Geological Society of America Annual Meeting, Abstracts with Programs, Seattle, Washington, November 2-5, 2003, p. 645.

Liberty, L.M., Trehu, A.M., Dougherty, M.D., and Blakely, R.J., 1996, High-resolution seismic-reflection imaging of the Mt. Angel/Gales Creek fault system beneath the Willamette Valley [abstract], EOS, Transactions of the American Geophysical Union, v. 77, p. F655.

Madin, I.P., Blakely, R.J., Witter, R.C., and Givler, R.W., 2007, High-resolution geophysical surveys of the Mount Angel Fault, northern Willamette Valley, Oregon [abstract]:  Geological Society of America Abstracts with Program, 2007 Annual Meeting of the Cordilleran Section, Bellingham, Washington, May 2007.

Madin, I., McConnell, V., and Blakely, R., 2003, Using surface magnetic profiles to map Columbia River basalt stratigraphy in Oregon:  Geological Society of America Annual Meeting, Abstracts with Programs, Seattle, Washington, November 2-5, 2003, p. 549.

Magsino, S., Sanger, E., Wash, T.J., Palmer, S.P., and Blakely, R.J., 2003, The Olympia structure:  Ramp or discontinuity?  New gravity data provide more information:  Geological Society of America Annual Meeting, Abstracts with Programs, Seattle, Washington, November 2-5, 2003, p. 479.

Mahan, Shannon, Troost, Kathy Goetz and Booth, Derek, 2003, Dating Sediments older than 100 ka in the Seattle-Tacoma Urban Corridor: a Test for infrared Stimulated Luminescence and Thermoluminescence on fine grain Deposits [abs.]: Geological Society of America Abstracts with Program, v. 35, no. 6, p. 215.

Mahan, Shannon A., Booth, Derek B., and Troost, Kathy Goetz, 2000, Luminescence Dating of Glacially Derived Sediments: A Case Study for the Seattle Geologic Mapping Project, [abstract], 2000 Abstracts with Programs, 96th Annual Meeting of the Cordilleran Section, Geological Society of America, Vancouver, British Columbia, April 2000, p. A-27.

Mahoney, J.B., Haugerud, R.A., Friedman, R.M., and Tabor, R.W., , 1996, Newby Group: Upper Jurassic volcanic-arc assemblage in the southern Methow terrane, Washington, Geological Society of America Abstracts with Programs, v. 28.

McDougall, Kristin, 1998, Paleooceanography and correlation of late Quaternary glacionmarine units in Washington, [abs.], Revista de la Sociedad Mexicana de Paleontologia, v. 9, p. 68-69.

Mclaughlin R.J., Clark, J.C., Jachens, R.C., Griscom, A., Langenheim, V., Schmidt, K.M., Wentworth, C.M., Wells, R.E., and Valin, Z., 1999, Geology and crustal structure of the Loma Prieta epicentral region, Supplement to EOS, Transactions of the American Geophysical Union, v. 80, p. 40.

McPhee, D.K., Langenheim, V.E., Blakely, R.J., Morin, R., and Wells, R.E., 2007, Geophysical modeling across the Tualatin basin, Oregon, and Implications on seismic hazards and water resources [abstract]:  Geological Society of America Abstracts with Program, 2007 Annual Meeting of the Cordilleran Section, Bellingham, Washington, May 2007.

McPhee, D.K., Langenheim, V.E., Blakely, R.J., Morin, R., and Wells, R.E., 2006, Crustal structure across the Tualatin basin, Oregon, from gravity and magnetic studies [abstract]:  EOS Transactions of the American Geophysical Union, v. 87, Fall Meeting Supplement, Abstract T43C-1651.

Mosher, D.C., Johnson, S.Y., Rathwell, G.J., Kung, R.B., Blakely, R.J., Brocher, T.M., Hewitt, A., Dadsman, S.V., Lowe, C., and Mulder, T., 2001, Neotectonics of the eastern Strait of Juan de Fuca: A digital geologic and geophysical atlas on CD-ROM, Seismological Research Letters, v. 72, p. 269.

Nelson, Alan R., Johnson, Samuel Y., Kelsey, Harvey M., Sherrod, Brian L., Wells, Ray E., Okumura, Koji, and Bogar, Robert, 2003, Late Holocene earthquakes on the Waterman Point reverse fault, another ALSM-discovered fault scarp in the Seattle fault zone, Puget Lowland, Washington, Geological Society of America Abstracts with Programs, v. 35, no. 6, Abst. 35-12.

Nelson, A.R., Johnson, S.Y., Pezzopane, S.K., Wells, R.E., Kelsey, H.M., Sherrod, B.I., Koehler, R.D., III, Bradley, L-A., Bucknam, R.C., Laprade, W.T., Cox, J.W., and Narwold, C.F., 2000, Postglacial and Late Holocene Earthquakes on the Toe Jam Strand of the Seattle Fault, Bainbridge Island, Washington, Geological Society of America Abstracts with Programs, v. 32, p. A-58.

Nelson, A.R., Pezzopane, S.K., Bucknam, R.C., Koehler, R.D., Narwold, C.F., Kelsey, H.M., LaPrade, W.T., Wells, R.E., Johnson, S.Y., 1999, Holocene surface faulting in the Seattle fault zone, Bainbridge Island, Washington, Seismological Research Letters, v. 70, no. 2, p. 233.

Norris, R.D., Weaver, C.S., Meagher, K.L., Qamar, A., and Blakely, R.J., 1999, Earthquake swarms at Mount Hood: Relation to geologic structure, Seismological Research Letters, v. 70, p. 218.

O’Connor, J.E., and Evarts, R.C., 2007, New findings on the Quaternary geologic history of the lower Columbia River corridor, Geological Society of America Abstracts with Programs, v. 39, no. 4, p. 28.

O’Conner, J.E., and Evarts, R.C., 2007, New findings on the Quaternary geologic history of the lower Columbia River corridor [abs.]: Geological Society of America Abstracts with Program, v. 39, no. 4, p. 28.

O’Connor, J.E., 2005, The Columbia River—on the leading edge, EOS (American Geophysical Union), v. 86, no. 18, abst. H31A-01.

O’Connor, J.E., Pringle, P., and Bourdeau, A., 2003, The Corps of Discovery in the Columbia River Gorge, Oregon and Washington, Geological Society of America Abstracts with Programs, v. 35, no. 6, p. 606. (Invited)

O'Connor, Jim, Sarna-Wojcicki, A.M., Wozniak, K.C., Gannett, M.W., and Conlon, T.D., 2003, Quaternary stratigraphic framework for hydrogeologic analysis of the Williamette Valley, Oregon. Geological Society of America, Abstracts with Programs, v. 35, no. 7, p. 488.  

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Pallister, J. S., R. Hoblitt, R. Denlinger, J. T. Hagstrum, D. Sherrod, K. Cashman, C. Thornber, and S. Moran, 2006.  Structural geology of the Mount St. Helens fault-gouge zone – field relations along the volcanic conduit – wallrock interface [poster], EOS, American Geophysical Union, Transactions, v. 87.

Peterson, J.J., Mahoney, J.B., and Haugerud, R.A., 1997, Constraints on Late Cretaceous movement on the Pasayten fault: The Pipestone Canyon Formation, Washington, Geological Society of America Abstracts with Programs, v. 29, n. 6, p. A-278.

Pierson, T. C., O'Connor, J., Turner, D., Pringle, P.T., Bourdeau, A., Atwater, B.F., Reynolds, N., Schuster, R. L., and Weaver, R., 2003, Breaching of the Bonneville landslide dam on the Columbia River 500-600 yr BP-Flood or no flood?: Third International Paleoflood Workshop, Hood River Oregon, August 1-7, 2003, p. 35.

Rapp, B.K., O'Connor, J.E., and Pierson, T.C., 2003, The Sandy River delta, Oregon: A record of late Holocene volcanism at Mt. Hood and sediment into the Columbia River, Geological Society of America Abstracts with Programs, v. 35, no. 6, p. 81.

Roberts, C.W., Blakely, R.J., and Finn, C.A., 1996, A merged aeromagnetic map of Oregon-new insights from existing data [abstract], 1996 Abstracts with Programs, 92nd Annual Meeting of the Cordilleran Section, Geological Society of America, Portland, Oregon, April, 1996, p. 105.

Romanyuk, T. Mooney, W.D., and Blakely, R., 2003, Geophysical investigations of the Cascade subduction zone, North America:  Geological Society of America Annual Meeting, Abstracts with Programs, Seattle, Washington, November 2-5, 2003, p. 562.

Romanyuk, T., Mooney, W.D., and Blakely, R.J., 1997, The Cascadia subduction zone: Two contrasting models of lithospheric structure [abstract], EOS, Transactions of the American Geophysical Union, v. 78, p. F717.

Saltus, R.W., Blakely, R.J., and Haeussler, P.J., 2003, Comparative aeromagnetic study of seismic hazards in two Pacific Rom forearc basin settings:  Puget Sound, Washington, and Cook Inlet, Alaska:  IUGG 2003 Scientific Program and Abstracts, Sapporo, Japan, June 30-July 11, 2003, abstract GAV.06/09P/D-007, p. B.257.

Sherrod, B.L., Brocher, T.M., Weaver, C.S., Bucknam, R.C., Blakely, R.J., Kelsey, H.M., Nelson, A.R., and Haugerud, R.A., 2003, Evidence for a late Holocene earthquake on the Tacoma fault, Puget Sound, Washington:  Geological Society of America Annual Meeting, Abstracts with Programs, Seattle, Washington, November 2-5, 2003, p. 98.

Sherrod, B.L., Haeussler, P.J., Wells, R., Troost, K., and Haugerud, R., 2001, Surface rupture in the Seattle fault zone near Bellevue, Washington, Seismological Research Letters, v. 72, p. 253.

Stewart, Richard J., Wooden, Joseph L., Brandon, Mark T., Vance, Joseph A., and Wells, Ray E., 2003, U-Pb shrimp ages from detrital zircons in the Grand Valley and Western Olympic lithic assemblages, Olympic subduction complex, Washington, Geological Society of America Abstracts with Programs, v. 35, no. 6, Abst. 209-5.

Tilden, J.E., Greene, H.G., and Blakely, R.J., 2004, Marine geology of the southwestern San Juan Islands:  New insights from multibeam imagery and processed aeromagnetic data:  American Geophysical Union 2004 Fall Meeting Program and Abstracts, OS33B-0582.

Tilden, J.E., Blakely, R.J., and Johnson, S.Y., 2005, Active deformation offshore southwestern San Juan Island, Washington: Implications for seismic hazard assessment:  Geological Society of America, 2005 Abstracts with Programs, Cordilleran Section Meeting, San Jose, California, p. 44.

Troost, K.G., Booth, D.B., Mahan, S.A., and Hagstrum, J.T. (2003) Presence of mid-Pleistocene deposits (MIS 4 through 8) in the Tacoma area: Did the Possession Glacier make it to Tacoma? [abstr.], Abstracts with programs, GSA Annual Meeting, v. 35, p. 215.

Troost, K.G. and Booth, D.B., 1997, Quaternary stratigraphy of the Tacoma area-status of mapping efforts, Abstracts, The 2nd Annual Symposium on the Hydrogeology of Washington State, Washington Department of Ecology and The Washington Hydrogeologic Society, August 25-27, 1997.

Troost, K.G. and Booth, D.B., 1999, Quaternary stratigraphy of the Seattle area, Seattle Urban Geologic Hazards Workshop, Program and Abstracts, Feb 24 and 25, Seattle, Washington.

Troost, K.G., and Booth, D.B., 1997, Quaternary stratigraphy of the Tacoma area-status of mapping efforts, Abstract volume, 2nd Symposium on the Hydrogeology of Washington State, Evergreen State College, Olympia, Washington, August 23, 1997, p. 103.

Troost, K.G., Booth, D.B., Sarna-Wojcicki, A., Meyer, C.E., and Hagstrum, J.T., 1997, Chronology, mineralogy, and correlation of Quaternary tephra and mudflow deposits in the Central Puget Lowland, Washington state, Abstracts with Programs, 1997 Annual Meeting, The Geological Society of America, Salt Lake City, Utah, Oct. 20-23, 1997, p. A-411.

Troost, K.G., Booth, D.B., Shimel, S.A., Haugerud, R.A., Kramer, S.L., Kayen, R.E., and Barnhardt, W.A., 2001, Geologic controls on ground failures in Seattle and vicinity during the 2001 Nisqually earthquake, Seismological Research Letters, v. 72, p. 396.

Troost, K.G., Haugerud, R.A., Walsh, T.J., Harp, E.L., Booth, D.B., Steele, W.P., Wegmann, K.W., Pratt, T.L., Sherrod, B.S., and Kramer, S.L., 2001, Ground failures produced by the Nisqually earthquake, Seismological Research Letters, v. 72, p. 396.

Troost, K.G., Mahoney, J.B., Booth, D.B., and Borden, R.K., 1998, Discriminating glacial from nonglacial sediments of the south-central Puget Lowland, Program with Abstracts, Annual Meeting, Seattle, WA, Sept 30-Oct 3, Association of Engineering Geologists, p. 130.

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Vogel, M.S., O'Connor, J.E., and Gaylord, D.R., 2004, Quaternary geology of the lower Lewis River: Influence of volcanogenic sedimentation following Mount St. Helens eruptions, Geological Society of America Abstracts with Programs, v. 36, no. 4, p. 14.

Walker, J.P., Wan, Elmira, and Sarna-Wojcicki, A.M., 2004, Uses Of Geochemical And Geochronological Databases Developed in the U.S. Geological Survey Tephrochronology Laboratory, Menlo Park, Ca.  Geological Society of America, Rocky Mountain/Cordilleran Sections Meeting, Abstracts with Programs Vol. 36, No. 4, April 2004.

Weaver, C.S., Frankel, A.D., Sherrod, B. L., Haugerud, R.A., Palmer, S.P., Meagher, K.L., and Blakely, R.J., 2005, The scenario earthquake and ground motions, in Scenario for Magnitude 6.7 Earthquake on the Seattle Fault: Earthquake Engineering Research Institute and the Washington Emergency Management Division.

Weaver, C.S., Meagher, K., Blakely, R.A., and Wells, R.E., 1999, The June 23 1997 Bainbridge Island, Washington, earthquake: Evidence that the Seattle fault is seismically active, Seismological Research Letters, v. 70, p. 219-220.

Weaver, C.S., Troost, K.G., Booth, D.B., Frankel, A., Wells, R.E., Mullen, J., and Nolan, T., 1999, The Seattle urban seismic hazard mapping project: a USGS contribution to Seattle's Project Impact, Seismological Research Letters, v. 70, no. 2, p. 256.

Weaver, C.S., Yelin, T.S., Meagher, K.L., Wells, R.E., and Blakely, R.J., 1998, Crustal earthquakes in Cascadia: Evidence for North American plate block tectonics [abstract], EOS, Transactions of the American Geophysical Union, v. 79, p. F874.

Wells, R.E., Walsh, K, Beeson, M., Fleck, R., Duvall, A., and Tolan, T., 2006, Quaternary deformation of the Portland Hills, Oregon – Constraints from the light rail tunnel:  Geol. Soc. America Abstracts with Programs, v. 38, no.5, p.97.

Wells, R.E., Blakely, R.J., and Scholl, D., 2006, Coseismic slip in subduction zones and its relation to crustal structure revealed by gravity anomalies:  U.S. Geological Survey Tsunami Sources Workshop 2006, Great Earthquake Tsunami Sources, Empiricism and Beyond, April 21-22, proceedings on CD-ROM, p. 33.

Wells, R.E., Blakely, R.J., Dragert, H., Kao, H., McCausland, W., and Malone, S., 2005, Co-seismic slip and deep tremor in subduction zones and their relation to crustal structure revealed by gravity anomalies:  Geological Society of America, 2005 Abstracts with Programs, Cordilleran Section Meeting, San Jose, California, p. 44.

Wells, R.E., 2004, Paleomagnetic Rotations in the Northwest U.S. - Setting the Stage for Contemporary Deformation Models of the Cascadia Convergent Margin, Eos Transactions American Geophysical Union, 85(47), Fall Meeting Supplement, Abstract Abstract U32A-07.

Wells, Ray E., 2003, Tectonics of the Cascade magmatic arc: Geological Society of America Abstracts with Programs, v. 35, no. 6, 262-1.

Wells, R.E., Blakely, R.J., Sugiyama, Y., Scholl, D.W., and Dinterman, P.A., 2003, Landward limit of coseismic slip in great subduction zone earthquakes—implications for great earthquakes in Cascadia:  Geological Society of America Annual Meeting, Abstracts with Programs, Seattle, Washington, November 2-5, 2003, p. 477.

Wells, R. E., Blakely, R. J., and Sugiyama, Y., 2000, Forearc basins and co-seismic slip in great subduction zone earthquakes, Supplement to EOS, Transactions of the American Geophysical Union, v. 81, p. 907.

Wells, R. E., Blakely, R. J., Simpson, R.W., and Sugiyama, Y., 2000, Tectonics of the Cascadia subduction zone, Northwest U.S. and adjacent Canada, Penrose Conference 2000, Great Cascadia Earthquake Tricentennial; Proceedings of the Geological Society of America Penrose Conference: Oregon Department of Geology and Mineral Industries Special Paper 33, p.135-136.

Wells, R., Blakely, R., and Weaver, C., 2000, Tectonic plates, microplates, and earthquakes in Cascadia, in Cascadia Quakes, a Tricentennial Exposition: U.S. Geological Survey, University of Washington, Burke Museum of Natural History and Culture, p. 10.

Wells, R.E., and Johnson, S.Y., 2001, Deformation of western Washington resulting from northward migration of the Cascadia forearc, Seismological Research Letters (April 2001), 72(2):237-238, SSA 2001 96th annual meeting, San Francisco, CA, United States (April 18, 2001) Publisher Seismological Society of America, El Cerrito, CA, ISSN 0895-0695.

Wells, R.E., Blakely, R.J., and Weaver, C.S., 1998, Tectonics and earthquake potential of Cascadia: Effects of rotation and northward transport of fore-arc crustal blocks in Oregon and Washington [abstract], Abstracts, Western Pacific Geophysics Meeting, Taipei.

Wells, R.E., Weaver, C.S., and Blakely, R.J., 1998, Cascadia forearc migration and its neotectonic significance, EOS, Transactions of the American Geophysical Union, v. 79, p. F874.

Wells, R.E., Weaver, C.S., and Blakely, R.J., 1999, Microplate motions and neotectonics of the Cascadia forearc, Seismological Research Letters, v. 70, p. 209.

Wells, Ray E., and Johnson, S.Y., 2000, Neotectonics of Western Washington and the Puget Lowland Resulting from Northward Migration of the Cascadia Forearc, Geological Society of America Abstracts with Programs, v. 32, p. A-75.

Wells, Ray E., Weaver, C.S., and Blakely, R.J., 1996, Crustal block motions in the Pacific Northwest: Implications for the earthquake potential of the Cascadia forearc [abstract], 1996 Abstracts with Programs, 92nd Annual Meeting of the Cordilleran Section, Geological Society of America, Portland, Oregon, April, 1996, p. 123.

Wong, I.G., Pezzopane, S.K., and Blakely, R.J., 1999, A characterization of seismic sources in western Washington and northwestern Oregon, Seismological Research Letters, v. 70, p. 221.

Yeats, R.S., St. Peters, K., Sherrod, B., Blakely, R., Weaver, C., Monken, M., and Bray, J., 2007, Surface rupture:  A paradigm shift in the Puget Sound region [abstract]:  Geological Society of America Abstracts with Program, 2007 Annual Meeting of the Cordilleran Section, Bellingham, Washington, May 2007.

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