USGS - science for a changing world

USGS Professional Pages

Blank space
Search USGS Professionals Featured Profiles Blank space Frequently Asked Questions  |  About The USGS Professional Pages
bio image of Heather  Wright

Heather Wright

Research Geologist

Contact Info


Short Biography

Education:

Ph.D. (Geological Sciences) University of Oregon, 2006

     Thesis title: Physical and chemical signatures of degassing in volcanic systems

B.A. (Geology) Whitman College, 1999

Appointments:

2013-present: Volcano Disaster Assistance Program, Cascades Volcano Observatory, USGS

2012-2013: California Volcano Observatory, USGS.  Timing and nature of volcanism/magmatism in the Salton Sea area, southern California

2010-2012: Mendenhall postdoctoral appointment, USGS Menlo Park, CA. Using crystal and glass compositions from eruptive products of Mt. Mazama (Crater Lake) volcano to examine magma chamber evolution processes; modelling this evolution through time using an integrated geochemical and thermodynamic approach.

2006-2009: Research fellow, Monash University, Melbourne, Australia. Physical volcanology and petrology of the Cerro Galan caldera complex, northern Argentina



Read Full Professional Summary

Publications

Cabrera, A., Weinberg, R.F., and Wright, H.M.N., 2015, Magma fracturing and degassing associated with obsidian formation: the explosive – effusive transition, Journ. Volcanol. Geotherm. Res. 298: 71-84 doi: 10.1016/j.jvolgeores/2014.12.014 [Link]

Karlstrom, L., Wright, H.M., and Bacon, C.R., 2015, The effect of pressurized magma chamber growth on melt migration and pre-caldera locations through time at Mount Mazama, Crater Lake, Oregon, Earth and Planetary Science Letters, 412:209-219 doi: 10.1016/j.epsl.2014.12.001 [Link]

Wright, H.M., Vazquez, J.A., Champion, D.E., Calvert, A.T., Mangan, M.T., Stelten, M, Cooper, K.M., Herzig, C., and Schriener, A., 2015, Episodic Holocene eruption of the Salton Buttes rhyolites, California, from paleomagnetic, U-Th, and Ar/Ar dating. Geochemistry, Geophysics, Geosystems, 16: 1198-1210 doi: 10.1002/2015GC005714 [Link]

Wright, H. M. and Cashman, K.V. 2014, Compaction and gas loss in welded pyroclastic deposits as revealed by porosity, permeability, and electrical conductivity measurements of the Shevlin Park Tuff, Geological Society of America Bulletin. 126: 234-247 doi: 10.1130/B30668.1 [Link]

Pardo, N., Cronin, S.J., Wright, H., Schipper, C.I., Smith, I., and Stewart, B., 2014, Pyroclast textural variation as an indicator of eruption-column steadiness in andesitic Plinian eruptions at Mt. Ruapehu, Bull. Volcanol. 76: 822, doi: 10.1007/s00445-014-0822-x

Wright, H.M.N., Cashman, K.V., Mothes, P.A., Hall, M.L., Ruiz, A.G., and Le Pennec, J.-L. 2012. Estimating rates of decompression from textures of erupted ash particles produced by 1999-2006 eruptions of Tungurahua Volcano, Ecuador. Geology. 7: 619-622 doi: 10.1130/G32948.1 [Link]

Wright, H.M., Bacon, C.R., Vazquez, J.A., and Sisson, T.W., 2012, Sixty-thousand years of magmatic volatile history before the caldera-forming eruption of Mount Mazama, Crater Lake, Oregon. Contributions to Mineralogy and Petrology doi: 10.1007/s00410-012-0787-8

Lesti, C., Porreca M., Giordano G., Mattei M., Cas R., Wright H., Viramonte J. 2011. High temperature emplacement of the Cerro Galán and Toconquis Group ignimbrites (Puna Plateau, NW Argentina) determined by TRM analyses. In Cas, R.A.F and Cashman, K.(eds) The Cerro Galán Ignimbrite and Caldera: characteristics and origins of a very large volume ignimbrite and its magma system. Bull. Volcanol. 73: 1535-1565 doi: 10.1007/s00445-011-0536-2

Cas, R.A.F., Wright, H.M.N., Folkes, C.B., Lesti, C., Porreca, M., Giordano, G., and Viramonte, J.G. 2011. The flow dynamics of an extremely large volume pyroclastic flow, the 2.08 Ma Cerro Galán Ignimbrite, NW Argentina, using deposit characteristics and contacts with basement topography at distal margins. In Cas, R.A.F and Cashman, K.(eds) The Cerro Galán Ignimbrite and Caldera: characteristics and origins of a very large volume ignimbrite and its magma system. Bull. Volcanol. 73: 1583-1609 doi. 10.1007/s00445-011-0564-y

Folkes, C.B., Wright, H.M, Cas, R.A.F., de Silva, S.L., Lesti, C., and Viramonte, J. 2011. A re-appraisal of the stratigraphy and volcanology of the Cerro Galán volcanic system, NW Argentina. In Cas, R.A.F and Cashman, K.(eds) The Cerro Galán Ignimbrite and Caldera: characteristics and origins of a very large volume ignimbrite and its magma system. Bull. Volcanol. 73: 1427-1454 doi:10.1007/849 s00445-011-0459-y

Folkes, C.B., de Silva, S., Wright, H.M., and Cas, R.A.F. 2011. Geochemical homogeneity of a long-lived large silicic system: evidence from Cerro Galan Caldera, NW Argentina. In Cas, R.A.F and Cashman, K.(eds) The Cerro Galán Ignimbrite and Caldera: characteristics and origins of a very large volume ignimbrite and its magma system. Bull. Volcanol. 73: 1455-1486 doi:10.1007/s00445-011-0511-y

Wright, H.M.N., Lesti, C., Cas, R.A.F., Porecca, M., Viramonte, J.G., Folkes, C. and Giordano, G. 2011. Columnar jointing in vapor phase altered, non-welded Cerro Galan Ignimbrite, Paycuqui, Argentina. In Cas, R.A.F and Cashman, K.(eds) The Cerro Galán Ignimbrite and Caldera: characteristics and origins of a very large volume ignimbrite and its magma system. Bull. Volcanol. 73: 1567-1582 doi: 10.1007/s00445-011-0524-6

Wright, H.M.N., Folkes, C.B., Cas, R.A.F, and Cashman, K.V. 2011. Heterogeneous pumice populations in the 2.08 Ma Cerro Galán Ignimbrite: implications for magma recharge and ascent preceding a large volume silicic eruption. In Cas, R.A.F and Cashman, K.(eds) The Cerro Galán Ignimbrite and Caldera: characteristics and origins of a very large volume ignimbrite and its magma system. Bull. Volcanol. 73:1513-1533 doi: 10.1007/s00445-011-0525-5 [Link]

Cabrera, A., Weinberg, R., Wright, H., and Vlotnik, S. 2010. Melt fracturing and healing: a mechanism for degassing and origin of obsidian. Geology, 39: 67-70. doi: 10.1130/G31355.1

Wright, H.M.N., Weinberg, R. 2009. Strain localization in vesicular magma: implications for rheology and fragmentation. Geology 37: 1023-1026. doi: 10.1130/G30199A.1 [Link]

Wright, H.M.N., Cashman, K.V., Gottesfeld, E., and Roberts, J.J. 2009. Pore structure of volcanic clasts: measurements of permeability and electrical conductivity. Earth and Planet. Sci. Lett. 280: 93-104. doi: 10.1016/j.epsl.2009.01.023 [Link]

Rust, A.C., Cashman, K.V., and Wright, H.M. 2008. Fudge factors in lessons on crystallization, rheology and morphology of basalt lava flows. Journal of Geoscience Education 56: 73-80

Wright, H.M.N., Cashman, K.V., Rosi, M., and Cioni, R. 2007. Breadcrust bombs as indicators of Vulcanian eruption dynamics at Guagua Pichincha volcano, Ecuador. Bull. Volcanol. 69: 281-300

Wright, H.M.N., Roberts, J.J., and Cashman, K.V. 2006. Permeability of anisotropic tube pumice: Model calculations and measurements. Geophys. Res. Lett. 33: L17316






                           

My Science Topics


Science Topic
Subtopic
Natural Hazardsvolcanoes
Natural Hazardsvolcanic activity



My USGS Science Strategy Areas

A National Hazard, Risk, and Resilience Assessment Program

Volcanology and petrology

Image of Current Focus for Volcanology and petrology

My research is driven by a fundamental interest in processes of shallow crustal magma accumulation, magmatic ascent and eruption, and syn-/post-eruptive deposition of erupted material.  My research integrates fieldwork with quantitative textural and chemical characterization of volcanic clasts, in order to produce conceptual models of the relevant geologic processes and provide inputs for computational models. I use (or have used) a variety of observation strategies and tools, including geologic mapping and input into GIS, field stratigraphic logging, x-ray tomography (synchrotron-based), permeability, porosity, and electrical conductivity measurement of rock cores, scanning electron microscope (SEM) and optical microscope imagery, electron microprobe and ion microprobe chemical analyses, and FTIR spectroscopic analyses.  

My work with the Volcano Disaster Assistance Program allows me the opportunity to see a diverse range of eruptive products and to contextualize the field relationships and physical characteristics of deposits with the monitoring data from pre-eruptive unrest.  I am fortunate to have the opportunity to learn an enormous amount from colleagues at volcano observatories around the world.  Some of those observatories are listed here:

Servicio Geologico Colombiano

Badan Geologi Indonesia

Observatorio Vulcanologico INGEMMET (en cooperacion con UNSA y IGP) Peru

Instituto Geofisico Ecuador

SERNAGEOMIN Chile


Contact Information

Heather Wright
1300 SE Cardinal Court Bldg. 10
Vancouver, WA 98683
hwright@usgs.gov
360-993-8916
360-993-8980 - Fax
Back to top

Accessibility FOIA Privacy Policies and Notices

USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: https://profile.usgs.gov/professional/mypage.php
Page Contact Information:Ask USGS
Page Last Modified: January 24 2013 17:21:51.
Version: 2.6