Dr. Greg A. Valentine

Office: 777 Natural Sciences Complex Phone: 716.645.4295 Email: gav4@buffalo.edu Website: Home Page Title: Professor, Center for GeoHazards Studies Director Degree: Ph.D., Geological Sciences, University of California Santa Barbara, 1988 Specialty: Volcanic risk, basaltic volcanic fields, pyroclastic deposits, volcano fluid dynamics, volcaniclastic and surface processes.

Courses Offered

GLY 431/531 Volcanology
GLY 428/528 Geologic Hazards and Risk
GLY 215 Sedimentology
GLY 578 Advanced Field Methods

Research Interests

Consequences of volcanic activity and spatial-temporal behavior of volcanic systems, with application to risk assessment and coupling to infrastructure response models. Physical processes associated with basaltic volcanism, from the scale of eruptive styles at individual volcanoes to the dynamics of basaltic fields. Interpretation of pyroclastic deposits including large-volume, widespread ignimbrites and associated caldera. Multiphase fluid dynamics and numerical modeling of explosive eruptions. Evolution of volcanic landforms, particularly in arid environments.

Recent Publications

Dartevelle S, Valentine GA (2008) Multiphase magmatic flows at Yucca Mountain, Nevada. Journal of Geophysical Research 113, B12209, doi:10.1029/2007JB005367

Valentine GA, Gregg TKP (2008) Continental basaltic volcanoes ? processes and problems. Journal of Volcanology and Geothermal Research 177, 857-873,
doi:10.1016/j.jvolgeores.2008.01.050

Keating GN, Pelletier J, Valentine GA, Statham B (2008) Evaluating suitability of a tephra dispersal model as part of a risk assessment framework. Journal of Volcanology and Geothermal Research 177: 397-404, doi: 10.1016/j.jvolgeores.2008.06.007

Keating GN, Valentine GA, Krier DJ, Perry FV (2008) Shallow plumbing systems for small-volume basaltic volcanoes. Bulletin of Volcanology 70: 563-582, doi:10.1007/s00445-007-0154-1

Gaffney ES, Damjanac B, Valentine GA (2007) Localization of volcanic activity: 2. Effects of pre-existing structure. Earth and Planetary Science Letters 263: 323-338, doi: 10.1016/j.epsl.2007.09.002

Dartevelle S, Valentine GA (2007) Transient multiphase processes during the explosive eruption of basalt through a geothermal borehole (Námafjall, Iceland, 1977) and implications for natural volcanic flows. Earth and Planetary Science Letters 262:363-384, doi: 10.1016/j.epsl.2007.07.053

Valentine GA, Perry FV (2007) Tectonically controlled, time-predictable basaltic volcanism from a lithospheric mantle source (central Basin and Range Province, USA). Earth and Planetary Science Letters , 261:201-216, doi:10.1016/j.epsl.2007.06.029

Valentine GA, Keating GN (2007) Eruptive styles and inferences about plumbing systems at Hidden Cone and Little Black Peak scoria cone volcanoes (Nevada, U.S.A.). Bulletin of Volcanology, 70:105-113, doi:10.1007/s00445-007-0123-8

Valentine GA, Krier DJ, Perry FV, Heiken G (2007) Eruptive and geomorphic processes at the Lathrop Wells scoria cone volcano. Journal of Volcanology and Geothermal Research, 161: 57-80, doi:10.1016/j.jvolgeores.2006.11.003

Valentine GA, Perry FV, Krier D, Keating GN, Kelley RE, Cogbill AH (2006) Small-volume basaltic volcanoes: eruptive products and processes, and post-eruptive geomorphic evolution in Crater Flat (Pleistocene), southern Nevada. Geological Society of America Bulletin , 118: 1313-1330 doi:10.1130/B25956.1

Valentine GA, Perry FV (2006) Decreasing magmatic footprints of individual volcanoes in a waning basaltic field. Geophysical Research Letters , 33: L14305, doi:10.1029/2006GL026743

Valentine GA, Krogh KEC (2006) Emplacement of shallow dikes and sills beneath a small basaltic volcanic center - the role of pre-existing structure (Paiute Ridge, southern Nevada, USA). Earth and Planetary Science Letters , 246: 217-230, doi:10.1016/j.epsl.2006.04.031

Valentine GA, Harrington CD (2006) Clast size controls and longevity of Pleistocene desert pavements at Lathrop Wells and Red Cone volcanoes, southern Nevada. Geology , 34: 533-536, doi:10.1130/G22481.1