Geoffrey Cromwell

Non Tenure Track Assistant Professor, Geology

Research Interests: Paleomagnetism and geomagnetism-including the time-averaged strength of the Earth's magnetic field in Iceland, Hawaii and Norway. Developing a 3D geologic model of San Diego Co. to better understand groundwater resources in the area.


  • Office:: Hameetman Science Center 219
  • Email: : cromwell@oxy.edu
  • Phone:: (323) 259-2556
  • Office Hours:: Wednesday 1pm-3pm

Education: B.A. Occidental College; M.S., Ph.D. University of California San Diego


Cromwell, G., C.G.. Constable, H. Staudigel, L. Tauxe, P. Gans (2013), Revised and updated paleomagnetic results from Costa Rica, Geochemistry Geophysics Geosystems, 14(9), 3379-3388, doi:10.1002/ggge.20199.
Cromwell, G., L. Tauxe, H. Staudigel, C.G. Constable, A.A.P. Koppers, and R.-B. Pedersen (2013), In search of long term hemispheric asymmetry in the geomagnetic field: results from high northern latitudes, Geochemistry Geophysics Geosystems, 14(8), 3234-3249, doi:10.1002/ggge.20174.
Cromwell, G., L. Tauxe, H. Staudigel, H. Ron (2015), Paleointensity estimates from historic and modern Hawaiian lava flows using glassy basalt as a primary source material, Physics of the Earth and Planetary Interiors, doi:10.1016/j.pepi.2014.12.007
In Review:
Cromwell, G., C.L. Johnson, L. Tauxe, C.G. Constable, N. Jarboe, Paleosecular variation over the last 10 Ma from a new global data set (PSV10), submitted to Geochemistry Geophysics Geosystems.
Cromwell, G., L. Tauxe, S.A. Halldorsson, New paleointensity results from rapidly cooled Icelandic lavas: Implications for Arctic geomagnetic field strength, submitted to Journal of Geophysical Research.