Julie Bowles

Assistant Professor
 (414) 229-6110
 Lapham Hall 366


PhD, University of California, San Diego
BS, University of Washington
BA, University of Puget Sound

Research Interests

Dr. Bowles is interested in how the Earth’s magnetic field varies over time; and understanding how and how well magnetic minerals record these variations; and using these “rock records” of changing magnetic fields and magnetic properties to interpret volcanic processes. Recent projects include documenting variations in Earth’s field intensity in pyroclastic flows in the western U.S.; using recorded field variations to constrain eruptive processes on the Galapagos Spreading Center and the Juan de Fuca Ridge; and creating synthetic igneous rocks in the lab to better understand the magnetic recording process in rocks from Earth and Mars.

Teaching Areas


Selected Publications

Fedorchuk, N. D., Dornbos, S. Q., Corsetti, F. A., Isbell, J. L., Petryshyn, V. A., Bowles, J., & Wilmeth, D. T. (2016). Early non-marine life: Evaluating the biogenicity of Mesoproterozoic fluvial-lacustrine stromatolites. Precambrian Research, 275, 105-118.
Bowles, J., Gee, J., Jackson, M., & Avery, M. (2015, October (4th Quarter/Autumn)). Geomagnetic paleointensity in historical pyroclastic density currents: Testing the effects of emplacement temperature and postemplacement alteration. Geochemistry Geophysics Geosystems, 16, 3607–3625.
Jackson, M. J., & Bowles, J. (2014, November). Curie temperatures of titanomagnetite in ignimbrites: Effects of emplacement temperatures, cooling rates, exsolution, and cation ordering. Geochemistry Geophysics Geosystems, 15(11), 4343–4368.
Brachfeld, S. A., Cuomo, D., Tatsumi-Petrochilos, L., Bowles, J., Shaw, D., & Hammer, J. (2014, November). Contributions of multidomain titanomagnetite to the intensity and stability of Mars crustal magnetic anomalies. Geophysical Research Letters, 41(22), 7997-8005.
Bowles, J., Coleman, A., McClinton, J. T., Sinton, J., White, S., & Rubin, K. (2014, June). Eruptive timing and 200-year episodicity at 92°W on the hotspot-influenced Galapagos Spreading Center derived from geomagnetic paleointensity. Geochemistry Geophysics Geosystems, 15(6), 2211–2224.
Bowles, J., Tatsumi-Petrochilos, L., Hammer, J. E., & Brachfeld, S. A. (2012, March). Multi-component cubic oxide exsolution in synthetic basalts: Temperature dependence and implications for magnetic properties. Journal of Geophysical Research, 117(B3), 2156-2202.
Bowles, J., Gee, J. S., Burgess, K., & Cooper, R. F. (2011, February). Timing of magnetite formation in basaltic glass; insights from synthetic analogs and relevance for geomagnetic paleointensity analyses. Geochemistry, Geophysics, Geosystems, 12(Q02001).
Gee, J. S., Yu, Y., & Bowles, J. (2010, March). Paleointensity estimates from ignimbrites; an evaluation of the Bishop Tuff. Geochemistry, Geophysics, Geosystems, 11(3), Q03010.