Publications


  1. Portner, R.A., Dreyer, B.M., Clague, D.A., (2020). Mid-ocean-ridge rhyolite (MORR) eruptions on the East Pacific Rise lack the fizz to pop. Geology, DOI: 10.1130/G47820.1.

  2. Clague, D.A., Caress, D.W., Dreyer, B.M., Lundsten, L., Paduan, J.B., Portner, R.A., Spelz-Madero, R., Bowles, J.A., Castillo, P.R., Guardado-France, R., Le Saout, M., Martin, J.F., Santa Rosa-del Río, M.A., and Zierenberg, R.A., (2018). Geology of the Alarcon Rise, Southern Gulf of California. Geochemistry, Geophysics, Geosystems, DOI: 10.1002/2017GC007348.

  3. Clague, D.A., Paduan, J.B., Caress, D.W., Chadwick, W.W., Le Saout, M., Dreyer, B.M., and Portner, R.A. (2017). High-resolution AUV mapping and targeted ROV observations of three historic lava flows at Axial Seamount. Oceanography 30(4), DOI:10.5670/oceanog.2017.426.

  4. Portner, R.A., Clague D.A., Helo C., Dreyer, B. D., Paduan, J.B. (2015). Contrasting styles of deep-marine explosive eruptions revealed from Axial Seamount push core records. Earth and Planetary Science Letters, v.423, p. 219-231, DOI:10.1016/j.epsl.2015.03.043.

  5. Clague, D.A., Dreyer, B.M., Paduan, J.B., Martin, J.F., Caress, D.W., Gill, J.B., Kelley, D.S., Thomas, H., Portner, R.A., Delaney, J.R., Guilderson, T.P., and McGann, M.L. (2014). Eruptive and tectonic history of the Endeavour Segment, Juan de Fuca Ridge, based on AUV mapping data and lava flow ages. Geochemistry Geophysics Geosystems, v. 15, no. 8, pg. 3364-3391, DOI:10.1002/2014GC005415.

  6. Portner, R.A., Clague, D.A., Paduan, J.B. (2014). Caldera formation and varied eruption styles on North Pacific seamounts: the clastic lithofacies record. Bulletin of Volcanology, v. 76, no. 845, 28p, DOI:10.1007/s00445-014-0845-3.

  7. Clague, D.A., Dreyer, B.M., Paduan, J.B., Caress, D.W., Chadwick Jr., W.W., Embley, R.W., Thomas, H. Portner, R.A., Guilderson, T.P., McGann, M.L., Butterfield, D.A. (2013). Geologic History of the summit of Axial seamount, Juan de Fuca Ridge. Geochemistry Geophysics Geosystems, v. 14, no. 10; p. 4403-4443, DOI: 10.1002/ggge.20240.

  8. Portner, R.A., Dickinson, J.A., Daczko, N.R. (2011). Interaction of gravity flows with a rugged mid-ocean ridge seafloor: an outcrop example from Macquarie Island. Journal of Sedimentary Research, v. 81, p. 355-375, DOI:10.2110/jsr.2011.30.

  9. Portner, R.A., Murphy, M.J., Daczko, N.R, (2011). A detrital record of lower oceanic crust exhumation within a Miocene slow-spreading ridge: Macquarie Island, Southern Ocean. Geological Society of America Bulletin, v. 123, p. 255-273.

  10. Portner, R.A., Daczko, N.R., Murphy, M.J., Pearson, N.J. (2011). Enriching mantle melts within a dying mid-ocean spreading ridge: insights from Hf-isotope and trace element patterns in detrital oceanic zircon. Lithos, v. 126, p. 355-368.

  11. Portner, R.A., Hendrix, M.S., Stalker, J.C., Miggins, D., Sheriff, S.D. (2011). Sedimentary response to orogenic exhumation in the northern Rocky Mountain Basin and Range province, Flint Creek Basin, west-central Montana. Canadian Journal of Earth Sciences, v. 48, p. 1131-1153.

  12. Portner, R.A., Daczko, N.R., Dickinson, J.A. (2010). Vitriclastic lithofacies from Macquarie Island (Southern Ocean): compositional influence on abyssal eruption explosivity in a dying Miocene spreading ridge. Bulletin of Volcanology, v. 72, p. 165-183.

  13. Daczko, N.R., Harb, N., Portner, R.A., Dickinson, J.A. (2009). Geochemical fingerprint of hyaloclasts in glassy fragmental rocks of Macquarie Island. Australian Journal of Earth Sciences, v. 56, p. 951-963.

  14. Dickinson, J.A., Harb. N., Portner, R.A., Daczko, N.R. (2009). Glassy fragmental rocks of Macquarie Island (Southern Ocean): Mechanism of formation and deposition. Sedimentary Geology, v. 216, p. 91-103.

  15. Portner, R.A Hendrix, M.S. (2005). Preliminary Geologic Map of the Eastern Flint Creek Basin, West Central Montana. Montana Bureau of Mines and Geology, Open File Report 521, 17 p., 1:24,000.