Joe Colgan, U.S. Geological Survey

Cenozoic Magmatism and Extension in the Northern Great Basin, Western United States

Presidential Address and Elections

--Call for nominations. We need a President, Vice President, and Treasurer but we could do without the last two.

  • DINNER MEETING - THURSDAY, October 10, 2013
  • (Note: we have to meet on Thursdays the next two months to get Hartley then we're back to Tuesdays next year)

    Location: Stanford University

  • 5:30 PM-Social (3/4) Hour, Hartley (in Mitchell Earth Sciences)
  • 6:15 PM-Dinner, Hartley
  • 7:30 PM-Meeting, Hartley

    Map and driving instructions

    Anyone wishing to attend the lecture only is welcome at no cost.

    This will be the 441st meeting since 1954

    photo of basin and range


    Joe has written extensively on this topic. He will be presenting a compilation of his most recent work and recent publications. See, for instance,

    Colgan, J.P., 2013, Reappraisal of the relationship between the northern Nevada rift and Miocene extension in the northern Basin and Range Province: Geology, v. 41(2), p. 211-214, doi: 10.1130/G33512.1,

    Colgan, J.P., McPhee, D.K., McDougall, K., and Hourigan, J.K., 2012, Superimposed extension and shortening in the southern Salinas Basin and La Panza Range, California: A guide to Neogene deformation of the Salinian block in the central California Coast Ranges: Lithosphere, v. 4(5) p. 411-429, doi:10.1130/L208.1,

    See also his USGS Professional Page

    About the Speaker

    photo of Joe
    Joe Colgan

    Joe Colgan studies the Cenozoic tectonic evolution of the western United States using geologic mapping and structural analysis, geochronology, low-temperature thermochronology, and geophysical data. He joined the USGS in 2006 as a Mendenhall postdoctoral fellow with the Mineral Resources program, after graduating from Stanford University in 2005 with Ph.D. in Geological and Environmental Sciences.

    Reservations: The preferred way to make reservations is simply to email Mike Diggles at by Oct. 8, tell him you will attend, commit to pay, and bring your payment to the meeting. Mike always emails a confirmation; if you don’t get one, assume email crashed yet again and email him a second time. A check made to “PGS” is preferred, payable at the meeting.

    If you want to pay in advance:

    Everyone (including Stanford folks now) Please make dinner reservations by Oct. 8. Contact Mike Diggles, at U.S. Geological Survey, 345 Middlefield Road, MS-973 Menlo Park, CA 94025, Tel.: (650) 329-5404. Send check made out to "PGS" to Mike.

    Dinner and the social hour is $35.00; this includes $5 that we use to help pay for students who are only $8.00 (also partially subsidized thanks to the School of Earth Sciences, Stanford University (Note, no-show reservations owe the full price).

    Doris, whose wonderful crew prepares our meals, asked that we let you know that people who are late RSVPing and people who show up without a reservation will be welcome but that they will be eating on paper plates with plastic utensils (food supply permitting).

    Dues for Academic Year 2013–2014 ($10.00) should be sent to Mike Diggles, U.S. Geological Survey, 345 Middlefield Road, Menlo Park, CA 94025. Mike’s phone: (650) 329-5404.

    Officers: Joe Colgan, President; Mike Diggles, Secretary-Treasurer; Elizabeth Miller, PGS Stanford University Coordinator

    map showing Mithell

    Future Events

    Date created: September 29, 2013
    Last modified: September 29, 2013
    Created by: Mike Diggles, Webmaster-Secretary-Treasurer, PGS.

    c/o U.S. Geological Survey, 345 Middlefield Road, Menlo Park, CA 94025. (650) 329-5404. email Mike Diggles at

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