Greg Valentine home page



Greg A. Valentine

Professor, Department of Geology

Director, Center for Geohazards Studies

State University of New York, University at Buffalo

411 Cooke Hall

Buffalo, NY  14260-1350   USA




Research Interests: Volcanic risk, basaltic volcanism, pyroclastic deposits, volcano fluid dynamics & modeling, phreatomagmatism.  More information


Current Work and Student Projects: Phreatomagmatic processes; Hazard SEES Persistent Volcanic Crises Resilience in the Face of Prolonged and Uncertain Risk; Lunar Crater Volcanic Field;  VHub – Cyberinfrastructure for Volcano Eruption and Hazards Modeling and Simulation.  More information


Degrees:  Ph.D., Geological Sciences, University of California Santa Barbara, 1988

               B.S. Geological Engineering & Geology, New Mexico Institute of Mining and Technology, 1984


Previous positions:  1997-2007 Group Leader, 1989-1996 Technical Staff Member

                                Los Alamos National Laboratory, Earth and Environmental Sciences Division


Recent publications

     Ball JL, Stauffer PJ, Calder ES, Valentine GA (2015) The hydrothermal alteration of cooling lava domes.  Bulletin of Volcanology 77:102, doi:10.1007/s00445-015-0986-z


     Graettinger AH, Valentine GA, Sonder I (2015) Circum-crater variability of deposits from discrete, laterally and vertically migrating volcanic explosions: experimental evidence and field implications.  Journal of Volcanology and Geothermal Research 308:61-69, doi: 10.1016/j.jvolgeores.2015.10.019


     Valentine GA, Sottili G, Palladino DM, Taddeucci J (2015) Tephra ring interpretation in light of evolving maar-diatreme concepts:  Stracciacappa maar (central Italy).  Journal of Volcanology and Geothermal Research 308: 19-29, doi:10.1016/j.jvolgeores.2015.10.010


     Breard ECP, Lube G, Cronin SJ, Valentine GA (2015) Hydrothermal blast-produced pyroclastic density currents:  dynamics and deposition models.  Bulletin of Volcanology 77:100, doi:10.1007/s00445-015-0980-5


     Sonder I, Graettinger AH, Valentine GA (2015) Scaling multiblast craters:  general approach and application to volcanic craters.  Journal of Geophysical Research 120, doi:10.1002/2015JB012018


     Palladino DM, Valentine GA, Sottili G, Taddeucci J (2015) Maars to calderas:  end-members on a spectrum of explosive volcanic depressions.  Frontiers in Earth Science 3:36, doi: 10.3389/feart.2015.00036


 Sweeney MR, Valentine GA (2015) Transport and mixing dynamics from explosions in debris-filled volcanic conduits: Numerical results and implications for maar-diatreme volcanoes.  Earth and Planetary Science Letters 425: 64-76, doi:10.1016/j.epsl.2015.05.038


 Graettinger AH, Valentine GA, Sonder I, Ross P-S, White JDL (2015) Facies distribution of ejecta in analog tephra rings from experiments with single and multiple subsurface explosions.  Bulletin of Volcanology 77:66, doi:10.1007/s00445-015-0951-x


    Valentine GA, Connor CB (2015) Basaltic volcanic fields.  In:  The Encyclopedia of Volcanoes, 2nd Edition, H. Sigurdsson (ed.), Elsevier, 423-439, doi: 10.1016/B978-0-12-385938-9.00023-7


 Harp AG, Valentine GA (2015) Shallow plumbing and eruptive processes of a scoria cone built on steep terrain.  Journal of Volcanology and Geothermal Research 294:37-55, doi:10.1016/j.jvolgeores.2015.02.008


 Cortes JA, Smith EI, Valentine GA, Johnsen R, Rasoazanamparany C, Widom E, Sas M, Ruth D (2015) Intrinsic conditions of magmas from the Lunar Crater Volcanic Field (Nevada): Implications for internal plumbing and magma ascent.  American Mineralogist 100: 396-413, doi:10.2138/am-2015-4812


 Valentine GA, Graettinger AH, Macorps E, Ross P-S, White JDL, Dšhring E, Sonder I (2015) Experiments with vertically- and laterally-migrating subsurface explosions with applications to the geology of phreatomagmatic and hydrothermal explosion craters and diatremes.  Bulletin of Volcanology 77:15, doi: 10.1007/s00445-015-0901-7


  Rasoazanamparany C, Widom E, Valentine GA, Smith EI, Cortes JA, Kuentz D, Johnsen R (2015) Origin of chemical and isotopic heterogeneity in a mafic, monogenetic volcanic Field: a case study of the Lunar Crater Volcanic Field, Nevada.  Chemical Geology 397: 76-93, doi:10.1016/j.chemgeo.2015.01.004.


 Tadini A, Bonali FL, Corazzato C, Cortes JA, Tibaldi A, Valentine GA (2014) Spatial distribution and structural analysis of vents in the Lunar Crater Volcanic Field (Nevada, USA).  Bulletin of Volcanology 76:877, doi:10.1007/s00445-014-0877-8


  Johnson PJ, Valentine GA, Cortes JA, Tadini A (2014) Basaltic tephra from monogenetic Marcath Volcano, central Nevada, Journal of Volcanology and Geothermal Research 281: 27-33, doi: 10.1016/j.volgeores.2014.05.007


  Valentine GA, Graettinger AH, Sonder I (2014) Explosion depths for phreatomagmatic eruptions.  Geophysical Research Letters, doi: 10.1002/2014GL060096


      Bowman DC, Taddeucci J, Kim K, Anderson JF, Lees JM, Graettinger AH, Sonder I, Valentine GA (2014) The acoustic signatures of ground acceleration, gas expansion, and spall fallback in experimental volcanic explosions.  Geophysical Research Letters 41: 1916-1922, doi:10.1002/2014GL059324


      Graettinger AH, Valentine GA, Sonder I, Ross P-S, White JDL, Taddeucci J (2014) Maar-diatreme geometry and deposits:  subsurface blast experiments with variable explosion depth.  G3 – Geochemistry, Geophysics, Geosystems 15, doi:10.1002/2013GC005198


      Valentine GA, van Wyk de Vries B (2014) Unconventional maar-diatreme and associated intrusions in the soft sediment-hosted Mardoux structure (Gergovie, France).  Bulletin of Volcanology 76:807, doi: 10.1007/s00445-014-0807-9


      Palma JL, Courtland L, Charbonnier S, Tortini R, Valentine GA (2014) Vhub:  a knowledge management system to facilitate online collaborative volcano modeling and research.  Journal of Applied Volcanology 3:2, doi: 10.1186/2191-5040-3-2


      Valentine GA, Cortes JA (2013) Time and space variations in magmatic and phreatomagmatic eruptive processes at Easy Chair (Lunar Crater Volcanic Field, Nevada, USA).  Bulletin of Volcanology 75:752, doi:10.1007/s00445-013-0752-z.


      Roche O, Nino Y, Mangeney A, Brand B, Pollock N, Valentine GA (2013) Dynamic pore pressure variations induce substrate erosion by pyroclastic flows.  Geology, doi:10.1130/G34668.1


      Ross P-S, White JDL, Valentine GA, Taddeucci J, Sonder I, Andrews RG (2013) Experimental birth of a maar-diatreme volcano.  Journal of Volcanology and Geothermal Research 260: 1-12, doi:10.1016/j.jvolgeores.2013.05.005


      Brown RJ, Valentine GA (2013) Physical characteristics of kimberlite and basaltic intraplate volcanism, and implications of a biased kimberlite record.  Geological Society of America Bulletin 125: 1224-1238, doi:10.1130/B30749.1


      Taddeucci J, Valentine GA, Sonder I, White JDL, Ross P-S, Scarlato P (2013) The effect of pre-existing craters on the initial development of explosive volcanic eruptions:  an experimental investigation.  Geophysical Research Letters 40: 507-510, doi:10.1002/grl.50176


      Valentine GA, White JDL (2012) Revised conceptual model for maar-diatremes: subsurface processes, energetics, and eruptive products.  Geology 40:  1111-1114, doi:10.1130/G33411.1


Valentine GA, White JDL, Ross P-S, Amin J, Taddeucci J, Sonder I, Johnson PJ (2012) Experimental craters formed by single and multiple buried explosions and implications for volcanic craters with emphasis on maars.  Geophysical Research Letters 39, 20, doi:10.1029/2012GL053716


Hintz AR, Valentine, GA (2012) Complex plumbing of monogenetic scoria cones: New insights from the Lunar Crater Volcanic Field (Nevada, USA).  Journal of Volcanology and Geothermal Research 239-240: 19-32, doi:10.1016/j.jvolgeores.2012.06.008.


Valentine GA (2012) Shallow plumbing systems for small-volume basaltic volcanoes, 2:  Evidence from crustal xenoliths at scoria cones and maars.  Journal of Volcanology and Geothermal Research 223-224:  47-63, doi:10.1016/j.jvolgeores.2012.01.012


Valentine GA, Doronzo DM, Dellino P, de Tullio MD (2011) Effects of volcano profile on dilute pyroclastic density currents:  numerical simulations.  Geology 39:  947-950, doi:  10.1130/G31936.1


Valentine GA, Shufelt NL, Hintz ARL (2011) Models of maar volcanoes, Lunar Crater (Nevada, USA).  Bulletin of Volcanology 73:  753-765, doi:10.1007/s00445-011-0451-6


Doronzo DM, Valentine GA, Dellino P, de Tullio MD (2010) Numerical analysis of the effect of topography on deposition from dilute pyroclastic density currents.  Earth and Planetary Science Letters 300:  164-173, doi:10.1016/epsl.2010.10.003


Genereau K, Valentine GA, Moore G, Hervig RL (2010) Mechanisms for transitions in eruptive style at a monogenetic scoria cone revealed by microtextural analysis (Lathrop Wells volcano, Nevada, USA).  Bulletin of Volcanology, doi:10.1007/s00445-010-0234-z


Valentine GA, Hirano N (2010) Mechanisms of low-flux intraplate volcanic fields – Basin and Range (North America) and Northwest Pacific Ocean. Geology 38: 55-58, doi:10.1130/G30427.



Full publication list

Also see other members of the UB Volcano Studies Group and their research.


Updated 17 November 2015