Brandon Browne
Professor
I teach courses about general geology, rocks and minerals, geologic field methods, California geology, and volcanology. My research combines mineralogy, mineral chemistry, rock and mineral textures, and field relations of volcanic deposits to study the storage and eruption of magmas from volcanoes, most recently in the California Cascasdes and Sierra Nevada. I started working as a geology professor in 2005.
Specialty Area
Igneous petrology, volcanology, field geology
Teaching
Dr. Browne teaches introductory geology courses, like GEOL 109 - General Geology; upper division geology courses, like GEOL 312 - Earth Materials, GEOL 314 - Petrology, and GEOL 474 - Volcanology; geologic mapping courses like GEOL 435 - Geologic Field Methods and GEOL 475 - Geology Field Camp; and general education geology courses, like GEOL 300 - Geology of California.
Education
Ph.D., Geology, 2005, University of Alaska, Fairbanks
M.S., Geology, 2001, University of Alaska, Fairbanks
B.S., Environmental Science, 1998, Oregon State University
B.S., Geology, 1998, Oregon State University
Courses Taught
GEOL 109/109L: General Geology
GEOL 300/300L: California Geology
GEOL 303: Earth's Resources and Global Environmental Change
GEOL 312: Earth Materials (Mineralogy + Lithology)
GEOL 314: Petrology
GEOL 380: Advanced Petrology
GEOL 474: Volcanology
GEOL 435: Geologic Field Methods II
GEOL 475: Summer Geology Field Camp
GEOL 482: Instrumental Methods in Geology (Scanning Electron Microscopy)
GEOL 486: Geology Senior Seminar
GEOL 554: Advanced Field Geology
Research
Dr. Browne's research uses geologic mapping and field relations of volcanic deposits coupled with geochemical and petrological analytical techniques of crystals and rocks to investigate a variety of magmatic and volcanic processes. His current research projects examine the volume, extent, and manner in which magma was erupted as well as better understand a variety of pre-eruptive magmatic differentiation processes in northern California (Mount Shasta, Medicine Lake Volcano), and eastern California (June Lake, Golden Trout Volcanic Field).
Publications
Articles and Selected Abstracts (student author):
Khoury, R.M., Browne, B.L. (2024) Petrologic and Geochemical Constraints on Pre-Eruptive Storage Conditions of Magmas Erupted During the ~12.5 ka Flare Up of Medicine Lake Volcano, CA. Geological Society of America Abstracts with Programs. Vol. 56, No. 4. doi: 10.1130/abs/2024CD-399710
Koulakov, I., Quasi, S. I., Izbekov, P., and Browne, B. L. (2023) Structure of shallow magma sources beneath Augustine Volcano (Alaska) inferred from local earthquake tomography. Journal of Volcanology and Geothermal Research, 107965. https://doi.org/10.1016/j.jvolgeores.2023.107965
Browne, B.L., Neal, C.A., and Bacon, C.R. (2022) The ~400 yr B.P. eruption of Half Cone, a post-caldera composite cone within Aniakchak caldera, Alaska Peninsula: Alaska Division of Geological & Geophysical Surveys Professional Report 126, 60 p. https://doi.org/10.14509/30839
Browne, B.L., Khoury, R. (2019) The compositionally and thermally-zoned rhyolite erupted from Long Canyon Dome, Golden Trout Volcanic Field, Kern Plateau, Sierra Nevada. Geological Society of America Abstracts with Programs. Vol. 51, No. 4, ISSN 0016-7592 doi: 10.1130/abs/2019CD-329698
Szymanski, M.E., Browne, B.L. (2019) Sr and Nd isotope compositions of Quaternary mafic lavas of the Golden Trout Volcanic Field, Kern Plateau, Sierra Nevada. Geological Society of America Abstracts with Programs. Vol. 51, No. 4, ISSN 0016-7592 doi: 10.1130/abs/2019CD-329019
Diniega, S., Sangha, S., Browne, B.L., (2018) Using satellite imagery to identify and analyze tumuli on Earth and Mars. Earth and Planetary Science Letters, v. 482, p. 52-61. https://doi.org/10.1016/j.epsl.2017.10.028
Browne, B.L., Sion, B.D., Phillips, F., Nicholson, R., (2017) Eruption styles and late Pleistocene ages from 36Cl dating of Groundhog Cone, the most recent and unglaciated basaltic volcano in the Golden Trout Volcanic Field, Kern Plateau, Sierra Nevada. Geological Society of America Abstracts with Programs. Vol. 49, No. 6 doi: 10.1130/abs/2017AM-295298
Browne, B.L., Becerra, R., Campbell, C., Saleen, P., Wille, F., (2017) Quaternary basaltic volcanism in the Golden Trout Volcanic Field, southern Sierra Nevada, California. Journal of Volcanology and Geothermal Research. http://doi.org/10.1016/j.jvolgeores.2017.05.028
Browne, B.L., Tepley, F., (2016) Very coarse-grained plagioclase-CPX-hornblende orthocumulate xenoliths from East Tanaga Volcano, western Aleutian Islands, Alaska. Geological Society of America Abstracts with Programs vol 48, No 4, https://doi: 10.1130/abs/2016CD-274417
Browne, B.L., Szramek, L. (2015) Rates of Magma Ascent and Storage. Encyclopedia of Volcanoes 2nd Edition, Sigurdsson, H., Houghton, B., McNutt, S., Rymer, H., Stix, J. (eds) Academic Press, p. 203-214
Churikova, T.G., Ivanov, B.V., Eichelberger, J., Worner, G., Browne, B., Izbekov, P. (2013) Major and trace element zoning in plagioclase from Kizimen Volcano (Kamchatka): Insights into magma-chamber processes. Journal of Volcanology and Seismology, v. 7, p. 112-130. https://doi.org/10.1134/S0742046313020024
Steiner, A., Browne, B.L., Nye, C. (2012) Quenched Mafic Inclusions in ≤2,200 yrs B.P. deposits at Augustine Volcano, Alaska. International Geology Review DOI:10.1080/00206814.2011.636641
Browne, B.L., Bursik, M., Deming, J., Louros, M., Martos, A., and Stine, S., (2010) Eruption Chronology and Petrologic Reconstruction of the Holocene Eruption of Red Cones, Southern Inyo Chain, California. Geological Society of America Bulletin, v. 122, p. 1401-1422. https://doi.org/10.1130/B30070.1
Browne, B.L., P. Izbekov, J. Eichelberger, T. Churikova, (2010) Constraints on the Pre-Eruptive Storage Conditions of the Holocene-Aged KZI Dacite Magma Erupted from Kizimen Volcano, Kamchatka. International Geology Review 52, issue 12, p. 95-110. https://doi.org/10.1080/00206810903332413
Blazevic, M., Kirby, M., Woods, A., Browne, B.L., Bowman, D. (2009). A sedimentary facies model for glacial-age sediments in Baldwin Lake, Southern California, Sedimentary Geology, 219, p. 151-168.
Coombs, M.L., McGimsey, R.G., Browne, B.L. (2008), Preliminary volcano-hazard assessment for Gareloi Volcano, Gareloi Island, Alaska: U.S. Geological Survey Scientific Investigations Report 2008-5159, 36 pp. LINK
Coombs, M.L., McGimsey, R.G., Browne, B.L. (2007), Preliminary volcano-hazard assessment for the Tanaga Volcanic Cluster, Tanaga Island, Alaska: U.S. Geological Survey Scientific Investigations Report 2007-5094, 46 pp. LINK
Browne, B.L. (2006) Investigating Magma Withdrawal Dynamics During Plinian Eruptions Through Mineral and Eruptive Stratigraphies: Examples From the Chemically Zoned 400 yr BP Eruption of Half Cone Volcano, Aniakchak National Park, Alaska. Eos Trans. AGU, 87(52), Fall Meet. Suppl., Abstract V53E-05
Browne, B.L., Gardner, J.E., (2006) The Influence of Magma Ascent Path on the Texture, Mineralogy, and Formation of Hornblende Reaction Rims. Earth and Planetary Science Letters 246, 161-176. https://doi.org/10.1016/j.epsl.2006.05.006
Eichelberger, J.C., Izbekov, P.E., Browne, B.L. (2006) Bulk Chemical Trends at Arc Volcanoes are not Liquid Lines of Descent. Lithos 87, 135-154. https://doi.org/10.1016/j.lithos.2005.05.006
Browne, B.L., Eichelberger, J.C., Patino, L.C., Vogel, T.A., Uto, K., Hoshizumi, H., (2006) Magma mingling as indicated by texture and geochemistry of plagioclase phenocrysts from Unzen volcano, SW Japan. Journal of Volcanology and Geothermal Research 154, 103-116. https://doi.org/10.1016/j.jvolgeores.2005.09.022
Browne, B.L., Eichelberger, J.C., Patino, L.C., Vogel, T.A., Dehn, J., Uto, K., Hoshizumi, H., (2006) Generation of porphyritic and equigranular enclaves during magma mingling at Unzen volcano, SW Japan. Journal of Petrology 47, 301-328. https://doi.org/10.1093/petrology/egi076
Browne, B.L., Gardner, J.E. (2005) The transport and deposition of pyroclastic material from the ~1000 A.D. caldera-forming eruption of Volcán Ceboruco, Nayarit, Mexico. Bulletin of Volcanology 67, 469-489. https://doi.org/10.1007/s00445-007-0169-7
Browne, B.L., Gardner J.E. (2004) The nature and timing of caldera collapse as indicated by accidental lithic fragments from the ~1000 A.D. eruption of Volcán Ceboruco, Mexico. Journal of Volcanology and Geothermal Research 130, 93- 105. https://doi.org/10.1016/S0377-0273(03)00283-X
Maps:
Coombs, M.L., McGimsey, R.G., and Browne, B.L. (2012) Geologic Map of Mount Gareloi, Gareloi Island, Alaska: U.S. Geological Survey Scientific Investigations Map 2012-3145, 1 plate LINK
