Jonathan 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 and paleomagnetism applied to:
· Geothermal resourses
· Basin and Range tectonics, volcanism, and metallogeny 
· Cascade Range and back-arc tectonics and metallogeny
· Alaska tectonics and metallogeny
· Paleomagnetic field behavior: magnetic polarity reversals, secular variation, excursions, paleointensity
· Magneostratigraphy and calibration of the magnetic polarity time scale 
· Hotspots and flood volcanism
· Mass Extinctions
· Electromagnetic monitoring of earthquakes
· Geophysical applications of Unmanned Aerial Systems (UAS)
 

PRESENT POSITIONS
Research Geophysicist; Geophysics Unit of Menlo Park (GUMP); Geology, Minerals, Energy and Geophysics Science Center (GMEG)
Chief, Geothermal Resource Investigations Project

AFILLIATIONS:
Consulting Professor: Geophysics Department, Stanford University
Research Associate, Geological Sciences Department, Central Washington University
Associate Researcher, Berkeley Geochronology Center
Associate Researcher, Earth and Planetary Sciences, U.C. Santa Cruz, California

PROFESSIONAL EXPERIENCE
Postdoctoral Researcher, Berkeley Geochronology Center
Postdoctoral Researcher, Institut de Physique du Globe de Paris
Postdoctoral Researcher, Earth and Planetary Sciences, U.C. Santa Cruz
Visiting Lecturer, Earth and Planetary Sciences, U.C. Santa Cruz

EDUCATION 
B.A. (Geophysics) University of California, Berkeley, 1986 
Ph.D. (Geophysics) University of California, Santa Cruz, 1994

Publications:

Glen, J.M., Ponce, D.A., and Bare, T.V., 1986, Description of magnetic tape containing a 3-minute average digital elevation model of Costa Rica: National Technical Information Service, 7 p.

Harris, R.N., and Glen, J.M., 1986, Principal facts for 163 gravity stations in the Cherry Creek Range and vicinity, Elko and White Pine Counties, Nevada: U.S. Geological Survey Open-File Report 86-559, 13 p.
 
Glen, J.M., Lewis, J.S., and Ponce, D.A., 1987, Gravity observations along a PASSCAL seismic line in west-central Nevada, U.S. Geological Survey Open-File Report 87-403, 10 p.

Carle, S.F., Glen, J.M., Langenheim, V.E., Smith, R.B., and Oliver, H.W., 1990, Isostatic Gravity Map of Yellowstone Park and Vicinity Wyoming, Montana, and Idaho, U.S. Geological Survey Open-File Report 90-649.

Glen, J.M., and Ponce, D.A., 1991, Aeromagnetic map of the Beatty 1/2 x 1-degree quadrangle, Nevada-California: U.S. Geological Survey Open-File Report 91-105, scale 1:200,000.

Glen, J.M., Liddicoat, J.C., and Coe, R.S., 1991, Refinement of the Gauss/Matuyama polarity boundary (2.48 m.y.), Searles Valley, California, in Reversals, secular variation and dynamo theory: proceedings of the second SEDI symposium, Glatzmaier, G.A. and Roberts, P.H. (eds.), Geophys. and Astrophys. Fluid Dynamics, 60, 1-4, 389-391.

Renne, P.R., Ernesto, M., Pacca, I.G., Coe, R.S., Glen, J., Prevot, M., and Perrin, M., 1992, The age of Parana flood volcanism, rifting of Gondwanaland, and the Jurassic-Cretaceous boundary, Science, 258, 5084, 975-979.

Glen, J.M., Coe, R.S. Smith, G.I., Boughn, S.S., and Altschul, I., 1993, Rock- and paleo-magnetic results from core OL92, Owens Lake, CA, U.S. Geological Survey Open-File Report 94-683.

Smith, G.I., Bischoff, J.L., and Glen, J.M., 1993, Lithologic variations in the OL92 cores from Owens Lake, California, and their probable climatic significance, U.S. Geological Survey Open-File Report 94-683.

Glen, J.M., Coe, R.S., and Liddicoat, J.C., 1994, Persistent features of polarity transition records from western North America, Geophys. Res. Lett., 21, 1165-1168.

Smith, G.I., Bischoff, J.L., Sarna-Wojcicki, A., Menking, K.M., and Glen, J., 1994, A 800,000 yr paleoclimatic record from Owens Lake, California: preliminary report, GSA Abs. with Progs., 26, 2, 93-94.

Liddicoat, J.C., Glen, J.M., and Coe, R.C., 1996, Transitional palaeomagnetic field at the terminus of the Mammoth reverse subchron (3.05 Ma), Surveys in Geophysics, 17, 183-188.

Renne, P.R., Glen, J.M., Milner, S.C., and Duncan, A.R., 1996, Age of Etendeka flood volcanism and associated intrusions in southwestern Africa, Geology, 24, 659-662.

Glen, J.M., and Coe, R.S., 1997, Rock- and paleo-magnetic characteristics of sediments from Owens Lake, CA: a detailed record of Pleistocene climate fluctuations, the Matuyama/Brunhes transition and within-Brunhes excursions, GSA Spec. Pap., 317, 67-78.

Glen, J.M.G., Renne P.R., Milner S.C., and Coe, R.S., 1997, AMS inferred magma flow in the coastal Paraná-Etendeka igneous province: evidence for rifting before flood volcanism, Geology, 25, 1131-1134.

Gilder, S.A., and Glen, J.M., 1998, Magnetic Properties of Hexagonal Closed-Packed Iron Deduced From Direct Observations in a Diamond Anvil Cell, Science, 279, 72-74.

Kosterov, A. A., Perrin, M., Glen, J. M., and Coe, R. S. 1998, Paleointensity of the Earth's magnetic field in Early Cretaceous time: The Parana basalt, Brazil, J. Geophys. Res., 103, 9739.

Liddicoat, J.C., Coe, R.C., and Glen, J.M.G., 1998, Record of the younger part of the Pringle Falls Excursion at Long Valley, California, Geophys. Jour. Int., 135, 663-670.

Glen, J.M.G., Coe, R.S., and Liddicoat, J.C., 1999, A Detailed Record of Paleomagnetic Field Change From Searles Lake, California  (2) The Gauss/Matuyama Polarity Reversal, J. Geophys. Res., 104, 12883-12894.

Glen, J.M.G., Liddicoat, J.C., and Coe, R.S., 1999, A Detailed Record of Paleomagnetic Field Change From Searles Lake, California  (1) Long-term Secular Variation Bounding the Gauss/Matuyama Polarity Reversal, J. Geophys. Res., 104, 12865-12882.

Metcalfe, I., Nicoll, R.S., Mundil, R., Foster, C., Glen, J., Lyons, J., Wang, Xiaofeng, Wang Cheng-yuan, Renne, P.R., Black, L., Qu Xun, and Mao Xiaodong, 2001, The Permian-Triassic boundary & mass extinction in China, Episodes, 24, 4, 239-244.

Langenheim, V.E., Bohannon, R.G., Glen, J.M.G., Jachens, R.C., Grow, J.A., Miller, J.J., Dixon, G.L., and Katzer, T.C., 2001, Basin configuration of the Virgin River Depression, Nevada, Utah, and Arizona: A geophysical view of deformation along the Colorado Plateau-Basin and Range transition, in Erskine, M.C., Faulds, J.E., Bartly, J.M., and Rowley, P.D., eds., The geologic transition, high plateaus to Great Basin - a symposium and field guide, The Mackin Volume, Geological Association Publication 30, Pacific Section American Association of Petroleum Geologists Publication GB78, Field symposium, September 20-22, 2001, 205-225.

Langenheim, V.E., Glen, J.M.G., Jachens, R.C., Dixon, G.L., Katzer, T.C., and Morin, R.L., 2000, Geophysical constraints on the Virgin River Depression, Nevada, Utah, and Arizona, U.S. Geological Survey Open-File Report 00-0407. [available on the World WideWeb at URL http://geopubs.wr.usgs.gov/open-file/of00-407/]

Renne, P.R., Scott, G.R., Glen, J.M., and Feinberg, J.M., 2002, Oriented inclusions of magnetite in clinopyroxene: source of stable remanent magnetization in gabbros of the Messum Complex, Namibia, Geochem. Geophys. Geosystems, 3, 12, 11p.

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.

Morin, R.L., and Glen, J.M.G., 2002, Principal Facts for 463 Gravity Stations in the Vicinity of Tangle Lakes, East-Central Alaska, U.S. Geological Survey Open-File Report 02-96, 21p. [available on the World WideWeb at URLhttp://geopubs.wr.usgs.gov/open-file/of02-96/].

Morin, R.L., and Glen, J.M.G., 2003, Principal Facts for 408 Gravity Stations in the Vicinity of the Talkeetna Mountains, South-Central Alaska, U.S. Geological Survey Open-File Report 03-27, 21p. [available on the World WideWeb at URLhttp://geopubs.wr.usgs.gov/open-file/of03-27/].

Sanger, E.A., and Glen, J.M.G., 2003, Density and Magnetic Susceptibility Values for Rocks in the Talkeetna Mountains and Adjacent Region, South-Central Alaska, U.S. Geological Survey Open-File Report 03-268 [available on the World WideWeb at URLhttp://geopubs.wr.usgs.gov/open-file/of03-268/].

Glen, J.M.G., Valet, J.P., Soler, V., Renne, P.R., and Elmaleh, A., 2003, A Neogene geomagnetic polarity reversal recorded in lavas from the island of Gomera, Canary Islands, Spain: Episodic volcanism or metastable transitional fields?, Geophys. Jour. International, 154, 2, 426-440.

Glen, J.M.G., McKee, E. H., Ludington, S., Ponce, D.A., Hildenbrand, T.G., and Hopkins, M.J., 2004, Geophysical Terranes of the Great Basin and Parts of Surrounding Provinces, U.S. Geological Survey Open-File Report 2004-1008, 303p. [available on the World WideWeb at URL http://pubs.usgs.gov/of/2004/1008/].

Fisher, M.A., Nokleberg, W.J., Ratchkovski, N.A., Pellerin, L., Glen, J.M.G., Brocher, T.M., and Booker, J., 2004, Geophysical investigation of the Denali fault and Alaska Range orogen within the aftershock zone of the October–November 2002, M 5 7.9 Denali fault earthquake, Geology, 32, 3, 269-272.

Coe, R.S., and Glen, J.M.G., 2004, The Complexity of Reversals, in, Channell, J.E.T., Lowrie, W., and Meert J., eds., Timescales of the internal geomagnetic field,  Amer. Geophys. U., Geophysical Monograph 145, 221-232.

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.

Pluhar, C.J., Coe, R.S., and Sampson, D.E., Glen, J.M.G., Monastero, F.C., and Tanner, S.B., 2005, Lava fingerprinting using paleomagnetism and innovative X-ray fluorescence spectroscopy: A case study from the Coso volcanic field, California, Geochemistry Geophysics Geosystems, 6, 4, 10.1029/2004GC000707.

Plenier, G., and Glen, J.G., 2005, Origin of magnetic complex magnetic fabrics, IRM Quarterly, 14, 4, 2-3.

Deino, A.L., Kingston, J.D., Glen, J.M., Edgar, R.K., and Hill, A., 2006, Precessional forcing of lacustrine sedimentation in the late Cenozoic Chemeron Basin, Central Kenya Rift, and calibration of the Gauss/Matuyama boundary, Earth and Planetary Science Letters, 247, 41-60.

Tilden, J.E., Ponce, D.A., Glen, J.M.G., and Gans, K.D., 2005, Gravity and Magnetic Data Along a Seismic Refraction-Reflection Line in Northwest Nevada and Northeast California, U.S. Geological Survey Open-File Report 05-1446 [available on the World WideWeb at URL http://pubs.usgs.gov/of/2005/1446/].

Tilden, J.E., Ponce, D.A., Glen, J.M.G., Chuchel, B.A, Tushman, K., and Duvall, A., 2006, Gravity, magnetic, and physical property data in the Smoke Creek Desert area, northwest Nevada:  U.S. Geological Survey Open-File Report 2006-1197 [available on the World WideWeb at URL http://pubs.usgs.gov/of/2006/1197/ ].

Ponce, D.A., , Glen, J.M.G., and Tilden, J.E., 2006, Geophysical Investigations of the Smoke Creek Desert and their Geologic Implications, Northwest Nevada and Northeast California, U.S. Geological Survey Open-File Report 2006-1176 [available on the World WideWeb at URL http://pubs.usgs.gov/of/2006/1176/].

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.

Glen, J.M.G., Schmidt, J., Pellerin, L., McPhee, D.K., and O'Neill, J.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.

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

Fisher, M.A., Nokleberg, W.J., Ratchkovski, N.A., Pellerin, L., and Glen, J.M.G., 2007 , Crustal structure of the Alaska Range Orogen and Denali Fault along the Richardson Highway, Geological Society of America, Special Publication, 431, Ch 3, p..

Fisher, M.A., Ratchkovski, N.A., Nokleberg, W.J., Pellerin, L., and Glen, J.M.G., 2007, Geophysical data reveal the crustal structure of the Alaska Range Orogen within the aftershock zone of the Mw=7.9 Denali fault earthquake, Bulletin of the Seismological Society of America, 94, S107-S131.

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.

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.

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.

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

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.

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.

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

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.

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.

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.

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.

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.

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.

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.

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. 

Shervais, J.W., Nielson, D., Evans, J.P., Lachmar, T., Christiansen, E.H., Morgan, L.,  Shanks, W.C.P., Delahunty, C., Schmitt, D.R., Liberty, L.M., Blackwell, D.D., Glen, J.M.,  Kessler, J.A., Potter, K.E., Jean, M.M., Sant, C.J., Freeman, T.G., 2012, Hotspot: The Snake River Geothermal Drilling Project — Initial Report, GRC Transactions, 36, 767-772.

Glen, J.M.G., Egger, A.E. Ippolito, C, and Athens, N., 2013, Correlation of Geothermal Springs with Sub-Surface Fault Terminations Revealed by High-Resolution, UAV-Acquired Magnetic Data, Proceedings, Thirty-Eight Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, California, February 2-13, 2013, 9p.

Shervais, J.W. , Schmitt, D.R., Nielson, D., Evans, J.P. , Christiansen, E.H., Morgan, L.,  Shanks, W.C.P., Prokopenko, A.A., Lachmar, T., Liberty, L.M., Blackwell, D.D., Glen, J.M.,  Champion, D., Potter, K.E., Kessler, J.A.,2013, First Results from HOTSPOT: The Snake River Plain Scientific Drilling Project, Idaho, U.S.A., Scientific Drilling, 15, 36-45.  doi:10.2204/iodp.sd.15.06.2013

Kappler, K.N., McPhee, D.K., Glen, J.M., and Klemperer, S.L., 2013, ULFEM time-series-analysis package: U.S. Geological Survey Open-File Report 2013-1285, 326 p.

Carlson, C.W., Pluhar, C.J., Glen, J.M.G., and Farner, M.J., 2013, Kinematics of the west-central Walker Lane: Spatially and temporally variable rotations evident in the Late Miocene Stanislaus Group, 9, 6, 1530-1551, doi: 10.1130/GES00955.1

Vandemeulebrouck, J., Sohn, R.A., Rudolph, M., Hurwitz, S., Manga, M., Johnston, M.J.S., Soule, S.A., McPhee, D.,  Glen, J.M.G., Karlstrom, L., Murphy., F.,  (in press, JGR) Eruptions at Lone Star Geyser, Yellowstone National Park, USA, Part 2: Constraints on Subsurface Dynamics.

Egger, A.E., Glen, J.M.G., and McPhee, D.K., 2014, Structural controls on geothermal circulation in Surprise Valley, CA: A re-evaluation of the Lake City fault zone, Geological Society of America Bulletin, 126, 3-4, 523-531.

Bouligand, C., Glen, J.M.G., Blakely, R.J., 2014, Distribution of buried hydrothermal alteration deduced from high resolution magnetic surveys in Yellowstone National Park, Jour Geophys. Res., DOI: 10.1002/2013JB010802.

Glen, J.M., McPhee, D.K., and Bedrosian, P.A., 2014, Geophysical investigations of the Geologic and Hydrothermal Framework of the Pilgrim Springs Geothermal Area, Alaska, Stanford Geothermal Workshop, 9p.