Education

Ph.D. in Geological Sciences, University of Michigan (2005)
Dissertation: Production of andesite in the western Mexican arc: constraints from argon chronology, volume analysis, and geochemistry.  Advisor: Rebecca A. Lange

B.A. in Geosciences (Honors), Franklin & Marshall College (1999)
Thesis:  Interaction of mafic and felsic magma in the Vinalhaven pluton, coastal Maine. Advisor: Robert A. Wiebe
Thesis:  The development of meter-scale cavities and herringbone calcite cement in the middle Cambrian Ledger Fm.  Advisor: Carol B. deWet

Positions Held

Assistant Professor, Union College                                                    2007-present

Visiting Assistant Professor, Oberlin College                                           2005-2007

Research Interests

• The origin of continental crust and its internal stratification
• Argon chronology and GIS methods applied to quantifying eruption rates at continental arcs
• Geochemical and textural profiles of phenocrysts and implications for magma genesis
• The role of water in magmatic systems
• Magma chamber processes including interactions between coexisting mafic and silicic magmas

Teaching Experience

Professor, Oberlin College
GEO 201    Mineralogy and Optical Crystallography                       
GEO 119     Vulcan to Volcano: An Introduction to Volcanism
GEO 120     Earth’s Environments                                               
GEO 361     Igneous and Metamorphic Petrology                       

Graduate Student Instructor, University of Michigan
GS-310  Igneous and Metamorphic Petrology    
GS-440  Camp Davis Field Camp, Jackson, WY
GS-117   ntroductory Geology                                                

Teaching assistant, Franklin & Marshall College
Geo-322    Igneous and Metamorphic Petrology
Geo-321    Mineralogy
Geo-221    History of the Earth
Geo-226    Surface of the Earth

Research Experience

Western Mexico (2000-2005)
Collected samples of volcanic rocks to determine eruptive rates.  Conducted 40Ar/39Ar analyses on groundmass and mineral separates.  Developed techniques to quantify volume of volcanic products using field mapping, orthophotos, digital elevation models, and ArcGIS software.  Analyzed minerals with the electron microprobe to determine elemental concentrations and zoning. 

Vinalhaven, Maine (1998-1999)
Detailed field mapping and sample collection of plutonic rocks to describe the interaction of mafic and felsic magmas.  Conducted whole-rock XRF analyses for major and trace elements.  Keck Consortium project advised by Bob Wiebe, Bud Wobus, and Dave Hawkins

Ledger Formation, PA (1998-1999)
Analyzed various calcite cements petograhically and with cathodoluminescence and scanning electron microscopy.  Micro-drilled cements for ICP-AA and stable isotope (C and O) analysis.

Venusian lava flows (1997)
Digitized lava flow margins on radar images from the Magellan orbiter.  Correlated fractal dimension of digitized margins with available geochemical data to infer viscosity.  Keck Consortium project advised by Eric Grofils, Linda Reinen, Sam Kozak, and Marty Gilmore.

Clarks Fork, WY (1996)
Field mapping to reconstruct the Clarks Fork drainage basin from the Pleistocene to the present.  Research Education for Undergraduates (REU) project advised by Marv Kauffman and Dusty Ritter.

Additional Field Experience

Franciscan Terrain, CA (2003)
Field assistant for graduate student (University of Michigan) studying the phase assemblages of blueschists.

Katmai, Alaska and Sierra Nevada, CA (1998)
Field assistant for Bob Wiebe (F&M) doing reconnaissance field work comparing interactions of mafic and felsic magmas in volcanic and plutonic settings with John Eichelberger (University of Alaska-Fairbanks)

Southern CO and Northern NM (1997)
Field mapping at University of New Mexico field camp directed by John Geissman

Awards and Honors

Outstanding Graduate Student Instructor Award (2004)
National Science Foundation graduate fellowship (2001-2003)
University of Michigan Geology Club, President (2001-2002)
Phi Beta Kappa (1999)
Geology Award for outstanding achievement, F&M (1999)
Alboum Award for mineralogy and petrology, F&M (1998)
NASA Delaware College Consortium Space Grant (1998)
John Marshall Scholar, F&M (1995)

Research students advised
Alice Colman            (Oberlin)         2006-07                                                                           

Research Grants

Oberlin-Kalamazoo-University of Michigan (OKUM) faculty exchange partnership grant (2006)
Oberlin research and development grant (2006)
Scott Turner Award, University of Michigan (2000, 2001, 2002, 2003)
Sigma Xi (2000)
Leser Award, F&M (1999)

Professional Affiliations

American Geophysical Union
Association of Women Geoscientists
Geological Society of America
Sigma Xi

Professional Development
NSF Cutting Edge workshop for early career geoscience faculty                                    2006

Publications

Frey, H.M., Lange, R.A., Hall, C.M., Delgado-Granados, H., and Nelson, S.A. (2007) The temporal evolution of Volcan Tepetiltic, western Mexico: 40Ar/39Ar constraints on the time scale for cone construction and the hiatus before its caldera forming eruption (in revision, Bulletin of Volcanology)

Frey, H.M., Lange, R.A., Hall, C.M., Delgado-Granados, H., and Carmichael, I.S.E. (2007) A Pliocene ignimbrite flare-up along the Tepic-Zacoalco Rift: Evidence for the initial stages of rifting between the Jalisco Block (Mexico) and North America: GSA Bulletin, v. 119, p. 49-64.

Carmichael, I.S.E., Frey, H.M., Lange, R.A., and Hall, C.M. (2005) The Pleistocene-Holocene cinder cones surrounding Volcan Colima, Mexico re-visited: 40Ar/39Ar ages, cone and lava volumes, oxidation states and sulfur content: Bulletin of Volcanology, v. 68, p. 407-419.

Frey, H.M., Lange, R.A., Hall, C.M., and Delgado-Granados, H. (2004) Magma eruption rates constrained by 40Ar/39Ar chronology and GIS for the Ceboruco-San Pedro volcanic field, western Mexico: Geological Society of America Bulletin, v. 166, p. 259-276.

deWet, C.B., Frey, H.M., Gaswirth, S.B., Mora, C.L., Rahnis, M., and Bruno, C.R. (2004) Origin of meter-scale submarine cavities and herringbone calcite cement in a Cambrian microbial reef, Ledger Formation (U.S.A.): Journal of Sedimentary Research, v. 74, p. 914-923.

Wiebe, R.A., Frey, H.M., and Hawkins, D.P. (2001) Basaltic pillow mounds in the Vinalhaven intrusion, Maine, Journal of Volcanology and Geothermal Research, v. 107, p. 171-184.

deWet, C.B., Dickson, J.A.D., Wood, R.A., Gaswirth, S.B., and Frey, H.M. (1999)  A new type of shelf margin deposit; rigid microbial sheets and unconsolidated grainstones riddled with meter-scale cavities.  Sedimentary Geology, v. 128, p. 13-21.

Abstracts

Frey, H.M., Lange, R.A., Ownby, S., and Crabtree, S. (2007) Plagioclase composition as an indicator of magmatic H2O concentrations in crystal-poor lavas from western Mexico: evidence for degassing induced crystallization, 2007 State of the Arc Conference (SOTA), Chile, abstracts.

Lange, R.A. and Frey, H.M. (2007) A new thermodynamic model for the plagioclase-liquid hygrometer: An application to the volcanic-plutonic connection question.  2007 State of the Arc Conference (SOTA), Chile, abstracts.

Ownby, S., Lange, R.A., Frey, H.M., and Hall, C.M. (2007) A comparison of eruption rates, proportions of lava types, and magma crystallinities between three volcanic fields in the Mexican arc: evidence for minimal differentiation in the upper crust.  2007 State of the Arc Conference (SOTA), Chile, abstracts.

Frey, H.M. and Lange, R.A. (2006)  Phenocryst compositional diversity as a consequence of degassing induced crystallization. Eos Trans. AGU, 86 (48), Fall Meet. Suppl., Abstract.

Lange, R.A. and Frey, H.M. (2006) A New Thermodynamic Model for the Plagioclase-Liquid Hygrometer. Eos Trans. AGU, 86 (48), Fall Meet. Suppl., Abstract.

Frey, H.M. (2005) Two-pyroxene thermometry’s inability to recover temperatures of hydrous arc andesites. Eos Trans. AGU, 86 (48), Fall Meet. Suppl., Abstract V13B-0555.

Frey, H.M., Lange, R.A., Hall, C.M., Delgado-Granados, H. (2004) Eruption of V. Tepetiltic, Mexico: Evidence for remelting of silicic ashflows revealed by 40Ar/39Ar geochronology.  Eos Trans. AGU, 85 (47), Fall Meet. Suppl., Abstract V53A-0606.

Frey, H.M. and Lange, R.A. (2004) Plagioclase growth in crystal-rich vs. crystal poor lavas in the V. Tequila volcanic field, Mexico.  Geological Society of America, 2003 annual meeting, abstracts with programs

Lange, R.A., Frey, H.M., Lewis-Kenedi, K., Hall, C.M., and Delgado-Granados, H. (2004) A Comparison of the Eruptive Histories of the Ceboruco-San Pedro and Tequila Volcanic Fields in Western Mexico: Ages, Volumes, and Relative Proportions of Lava Types.  Geological Society of America Penrose Conference, Neogene-Quaternary Continental Margin Volcanism, abstracts.

Frey, H.M., Lewis-Kenedi, K., Lange, R.A., Hall, C.M., Delgado-Granados, H. (2003)  New insights into volcanic hazards in western Mexico: multiple cone-building episodes at arc stratovolcanoes revealed by 40Ar/39Ar geochronology.  Eos Trans. AGU, 84 (46), Fall Meet. Suppl., Abstract V11I-02.

Frey, H.M., Lange, R.A., Hall, C.M., Delgado-Granados, H. (2003) 40Ar/39Ar ages of silicic ash flow tuffs and lavas at the Jalisco Block (Mexico) boundary: constraints on volcanism, uplift and rifting.  Geological Society of America, 2003 annual meeting, abstracts with programs.

Frey, H.M., K., Lange, R.A., Hall, C.M., Delgado-Granados, H. (2002) Eruptive Productivity of the Ceboruco-San Pedro volcanic field, Nayarit, Mexico.  Eos Trans. AGU, 83(47), Fall Meet. Suppl., Abstract V12C-01.

Frey, H.M., K., Lange, R.A., Hall, C.M., Delgado-Granados, H. (2001) Ar-Ar results from the San Pedro-Ceboruco volcanic field, Nayarit, Mexico.  Union Geofisica Mexicana, 2001 annual meeting, abstracts with programs, v. 21, p. 236.

Frey, H.M. and deWet, C.B. (1999) Shelf-margin instability and the formation of meter-scale, horizontal submarine cavities in Cambrian microbialite. Annual Meeting Expanded Abstracts - American Association of Petroleum Geologists, vol.1999, p. A43.

Frey, H.M. and Wiebe, R.A. (1999) Basaltic pillow mounds in the Vinalhaven granite-gabbro complex, coastal Maine.  Abstracts with Programs - Geological Society of America, v. 31, p. 16.

Pike, W.A., Frey, H.M.; Krull, A.E., Grofils, E.B., Gilmore, M.S., Reinan, L.A., and Kozak, S.J. (1998)  Viscosity of Venusian lava flows; constraints from fractal dimension and chemical composition. Abstracts of Papers Submitted to the Lunar and Planetary Science Conference, vol. 29