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GMEG - Geophysics Unit of Menlo Park, CA- (GUMP)


Geophysics Unit of Menlo Park, CA (GUMP)

U.S. Geological Survey - Western Region - Geology and Geophysics



Jonathan M.G. Glen

Research Geophysicist
Geophysical Unit

Menlo Park, CA (GUMP)

U.S. Geological Survey
345 Middlefield Road, MS989
Menlo Park, CA 94025
phone: (650) 329-5282
fax: (650) 329-5133

Jonathan M.G. Glen




I am a geophysicist with the U.S. Geological Survey working with the Geology, Minerals, Energy and Geophysics Science Center in Menlo Park, California. My recent research has mostly focused on applying potential-field, and rock- and paleo-magnetic methods to geologic and tectonic problems in the western U.S.



My work involves studies in potential field geophysics, rock- and paleo-magnetism, and geomagnetism, applied to:
·  Basin and Range tectonics, volcanism, and metallogeny
·  Cascade Range and back-arc tectonics and metallogeny
·  Geothermal resourses in the western U.S.
·  Alaska tectonics and metallogeny
·  Paleomagnetic field behavior: magnetic polarity reversals, secular variation, excursions, paleointensity
·  Magneostratigraphy and calibration of the magnetic polarity time scale
·  Magma flow (using anisotropy of magnetic susceptibility)
·  Hotspots, continental rifting, and flood volcanism
·  Mass Extinctions
·  Electromagnetic monitoring of earthquakes
·  Geophysical applications of Unmanned Aerial Systems (UAS)



Recent publications

Bogue, S.W., and Glen, J.M.G., 2011, Very rapid geomagnetic field change recorded by the partial remagnetization of a lava flow, Geophys. Res. Lett., doi:10.1029/2010GL044286.

Jarboe, N.A., Coe, R.S., and Glen, J.M.G., 2011, Evidence from lava flows for complex polarity transitions: the new composite Steens Mountain reversal record, Geophysical Journal International, 186, 2, 580–602.

Glen, J.M.G., Schmidt, J.M., and Connard, G.G., 2011, Three-dimensional model of an ultramafic feeder system to the Nikolai Greenstone mafic large igneous province, central Alaska Range, Geochem. Geophys. Geosyst., doi:10.1029/2011GC003508.

Athens, N.D., Glen, J.M.G., Morin, R.L., and Klemperer, S.L., 2011, ATV magnetometer systems for efficient ground magnetic surveying, The Leading Edge, 30, 394-398.

Neumannn, D.A., McPherson, S., Klemperer, S.L., Glen, J.M.G, McPhee, D.K, and Kappler, K., 2011, Documentation for a web site to serve ULF-EM (Ultra-Low Frequency Electromagnetic) data to the public: U.S. Geological Survey Open-File Report 2010-1321, 44 p.

Ponce, D.A., Glen, J.M.G., Watt, J., and Casteel, J., 2010, Geophysical Setting of the Blue Mountain Geothermal Area, North-Central Nevada and its Relationship to a Crustal-Scale Fracture Associated with the Inception of the Yellowstone Hotspot, transactions of the Geothermal Resources Council, 34, 881-886.

Egger, A.E., Glen, J.M.G., and Ponce, D.A., 2010, The northwestern margin of the Basin and Range Province, Part 2: Structural setting of a developing basin from seismic and potential field data, Tectonophysics, 488, 150-161.

Bouligand, C., Glen, J.M.G., and Blakely, 2009, Mapping Curie temperature depth in the western United States with a fractal model for crustal magnetization, Journal of Geophysical Research, 114, B11104, 1-25.

Glen, J.M.G., Nomade, S., Lyons, J.J., Metcalfe, I., Mundil, R., and Renne, P.R., 2009, Magnetostratigraphic correlations of Permian–Triassic marine-to-terrestrial sections from China, Journal of Asian Earth Sciences, 36, 521-540, doi:10.1016/j.jseaes.2009.03.003. and supplement

Schmidt, J.M., Glen, J.M.G., and Morin, R.L., 2009, The Longview/Lakeview Barite Deposits, Southern National Petroleum Reserve, Alaska (NPRA)—Potential-field Models and Preliminary Size Estimates, U.S. Geological Survey Professional Paper 1760–C, 29p.

Ponce, D.A., Glen, J.M.G., Egger, A.E., Bouligand, C., Watt, J.T., and Morin, R.L., 2009, Geophysical studies in the vicinity of the Warner Mountains and Surprise Valley, northeast California, northwest Nevada, and southern Oregon, U.S. Geological Survey Open-File Report 2009-1157, 19p.

Jarboe, N.A., Coe, R.S., Renne, P.R., Glen, J.M.G., and Mankinen, E.A., 2008, Quickly erupted volcanic sections of the Steens Basalt, Columbia River Basalt Group: Secular variation, tectonic rotation, and the Steens Mountain reversal, Geochemistry, Geophysics, Geosystems, 9, 11, 24p. doi:10.1029/2008GC002067

Glen, J.M.G., Egger, A.E., and Ponce, D.A., 2008, Structural control of hot springs in a developing basin-and-range setting, Surprise Valley, California, northwestern Great Basin, transactions of the Geothermal Resources Council,  32, 279-284.

Ponce, D.A., and Glen, J.M.G., 2008, A prominent geophysical feature along the northern Nevada rift and its geologic implications, north-central Nevada, Geosphere, 4, 1, 207–217.

Watt, J.T., Glen, J.M.G., John, D.A., Ponce, D.A., 2007, Three-dimensional geologic model of the northern Nevada rift and the Beowawe geothermal system, north-central Nevada, Geosphere, 3, 6, 667-682.

Glen, J.M.G., Schmidt, J., and Morin, R.,2007, Gravity and magnetic character of southcentral Alaska: constraints on geologic and tectonic interpretations, and implications for mineral exploration, Geological Society of America, Special Paper 431, Ch 23, p.593-622. and supplement

Glen, J.M.G., Schmidt, J., Pellerin , L., McPhee, D.K., and O’Niell, M., 2007, Crustal structure of Wrangellia and adjacent terranes inferred from geophysical studies along a transect through the northern Talkeetna Mountains, Geological Society of America, Special Paper 431, Ch 2, p.21-41.

Lerch D.W., Klemperer, S.L., Glen, J.M.G., Ponce, D.A., Miller, E.L., Colgan, J.P., 2007, Crustal structure of the northwestern Basin and Range Province and its transition to unextended volcanic plateaus, Geochem. Geophys. Geosyst., 8, Q02011, doi:10.1029/2006GC001429.


Other selected publications

Glen, J.M.G., 2004, A kinematic model for the southern Alaska orocline based on regional fault patterns, Geological Society of America, Special Publication 383, Ch. 11, 161-172.

Glen, J.M.G., and Ponce, D.A., 2002, Large-scale fractures related to inception of the Yellowstone hotspot, Geology, 30, 7, 647-650.

Ponce, D.A., and Glen, J.M.G., 2002, Relationship of Epithermal Gold Deposits to Large-scale Fractures in Northern Nevada, Economic Geology, 97, 3-9.


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