Publications
Hoover, W., Penniston-Dorland, S., Piccoli, P. and Kylander-Clark, A., (2023), Reaction-induced porosity in an eclogite-facies vein selvage (Monviso Ophiolite, W. Alps): Textural evidence and in situ trace elements and Sr isotopes in apatite, Journal of Petrology 64 (1), egac128. https://doi.org/10.1093/petrology/egac128
Hoover, W., Condit, C., Lindquist, P., Moser, A and Guevara, V., (2022a), Episodic slow slip hosted by talc-bearing metasomatic rocks: High strain rates and stress amplification in a chemically reacting shear zone, Geophysical Research Letters 49 (21), e2022GL101083. https://doi.org/10.1029/2022GL101083
Hoover, W., Penniston-Dorland, S., Baumgartner, L., Bouvier, A.-S. and Dragovic, B., (2022b), Episodic fluid flow in an eclogite-facies shear zone: Insights from Li isotope zoning in garnet, Geology 50, 746-750. https://doi.org/10.1130/G49737.1
Hoover, W., Penniston-Dorland, S., Baumgartner, L., Bouvier, A.-S., Baker, D., Dragovic, B. and Gion, A., (2021), A method for SIMS analysis of lithium isotopes in garnet: The utility of glass reference materials, Geostandards and Geoanalytical Research 45, 477-499. https://doi.org/10.1111/ggr.12383
Hoover, W., Page, F.Z., Schulze, D., Kitajima, K. and Valley, J. (2020a), Massive fluid influx beneath the Colorado Plateau (USA) related to slab removal and diatreme emplacement: Evidence from oxygen isotope zoning in eclogite xenoliths, Journal of Petrology 61. https://doi.org/10.1093/petrology/egaa102
Barnes, J., Penniston-Dorland, S., Bebout, G., Hoover, W., Beaudoin, G. and Agard, P. (2019), Chlorine and lithium behavior in metasedimentary rocks during prograde metamorphism: A comparative study of exhumed subduction complexes (Catalina Schist and Schistes Lustrés), Lithos 336-337, 40-53. https://doi.org/10.1016/j.lithos.2019.03.028
Publications in prep
Hoover, W., Condit, C., Moser, A, Mulcahy, S., Pike, C., Lindquist, P., and Guevara, V., (in prep), Forming a slow slipping subduction interface: P-T-t-X history of metasomatic rocks.
Hoover, W., Penniston-Dorland, S., Teng, F.-Z., (in prep), Fault-valve-style fluid flow at the subduction interface: Lithium chronometry of amphibolite-facies mélange blocks (Catalina Schist, CA).
Theses
Hoover, W. (2021), Characterizing the duration, periodicity and chemical impact of fluid transport in the subducting slab: Insights from isotope geochemistry of high-pressure metamorphosed oceanic crust, University of Maryland PhD dissertation, p. 306.
Hoover, W. (2014), Eclogites and eclogites: Oxygen isotope evidence of a shared subduction origin for Franciscan eclogites and Moses Rock eclogite xenoliths, Oberlin College Undergraduate Honors Thesis, p. 68.
Invited talks
“Subduction zone seismicity hosted by chemically-reacting rocks”, University of Illinois, Chicago, Department of Earth and Environmental Science, March 2023.
“Subduction zone seismicity hosted by chemically-altered rocks”, Occidental College, Department of Geology Seminar, November 2022.
“Chemically-reacting shear zones and subduction zone seismicity”, Central Washington University, Geology Seminar Series, November 2022.
“Chemo-mechanical interactions at the subduction interface: Insights from the rock record on Pimu/Catalina Island, CA”, University of Washington, Seismolunch, March 2022.
“Episodic fluid flow in an eclogite-facies shear zone: Insights from Li isotope zoning in garnet”, University of Washington, Earth and Space Science Colloquium, October 2021.
“Episodic fluid transport in a subduction shear zone: Application of a novel in situ method for Li isotope measurement”, University of Southern California Lithospheric Dynamics Seminar, September 2021.
“Episodic fluid transport in a subduction shear zone: Application of a novel in situ method for Li isotope measurement”, E-FIRE Research Showcase, April 2021.
“Fluid history of an eclogite-facies apatite vein: Evolving fluid composition or multiple sources”, University of Lausanne Petrology Seminar, November 2019.
Conference abstracts
Easthouse, G.*, Hoover, W., Teng, F., Condit, C., Berg, A., and Pike, C. (2023), Tracing the formation of talc rich mélange rocks with magnesium isotopes, GSA Cordilleran Section Meeting, Reno, NV, May 2023.
Hoover, W., Condit, C., Moser, A, Mulcahy, S., Pike, C., Lindquist, P., and Guevara, V., (2023), Forming a slow slipping subduction interface: P-T-t-X history of metasomatic rocks, GSA Cordilleran Section Meeting, Reno, NV, May 2023.
Aikin, N., Hoover, W. and Condit, C. (2022), Boots on the Ground: Going Beyond Land Acknowledgements with the Heron's Nest Land Back Project, AGU Fall Meeting, Chicago, IL, December 2022.
Pike, C., Hoover, W. and Condit, C. (2022), Metasomatism and Fluid Infiltration of Actinolite, Talc-, and Chlorite-Actinolite Schist during Subduction on Santa Catalina Island, California: An Isocon Analysis, AGU Fall Meeting, Chicago, IL, December 2022.
Hoover, W., Condit, C., Moser, A., Lindquist, P. and Guevara, V., (2022c), The role of metasomatism in episodic tremor and slow slip: stress and strain rate variations in a chemically reacting shear zone, GSA Annual Meeting, Denver, CO, October 2022
Lindquist, P., Condit, C., Guevara, V., Hernández Uribe, D. and Hoover, W., (2022), Fluid release and silica metasomatism near the plate interface beneath Guerrero, Mexico: predicting talc production at the conditions of episodic tremor and slow slip, GSA Annual Meeting, Denver, CO, October 2022
Hoover, W., Condit, C., Moser, A., Lindquist, P. and Guevara, V., (2022d), Stress and strain rate variations in a chemically reacting shear zone: the role of metasomatism in producing slow slip and tremor, Goldschmidt Conference, Honolulu, HI, July 2022.
Hoover, W. and Penniston-Dorland, S. (2021), Rapid, uniform fluid flow at the subduction interface: Lithium chronometry of amphibolite-facies mélange blocks (Catalina Schist, CA), AGU Fall Meeting, December 2021.
Hoover, W., Penniston-Dorland, S., Baumgartner, L., Bouvier, A.-S. and Dragovic, B. (2020b), Cyclic fluid flow in a high-pressure shear zone: Insights from Li isotope zoning in garnet, AGU Fall Meeting, December 2020.
Boak, A., Hoover, W., Penniston-Dorland, S., Piccoli, P. and Ash, R. (2019), Understanding fluid behavior in Monviso using chlorite-bearing altered eclogites from the Lower Shear Zone, AGU Fall Meeting, San Francisco, CA, December 2019.
Hoover, W., Penniston-Dorland, S. and Piccoli, P. (2019a), Multiple fluid compositions preserved in an eclogite-facies apatite vein (Monviso Ophiolite, Western Alps), Emile Argand Conference on Alpine Geological Studies, Sion, Switzerland, September 2019.
Hoover, W., Penniston-Dorland, S., and Piccoli, P. (2019b), Low-salinity fluids in an intra-slab shear zone: Insights into fluid salinity from apatite in the Monviso Ophiolite, GeoPRISMS TEI, San Antonio, TX, February 2019.
Goltz, A., Hoover, W., Page, F. Z., Moreira, H., Storey, C., Kitajima, K. and Valley, J. (2017), Microanalyzing Metasomatism: Correlative Microanalysis of Trace Elements and Oxygen Isotopes in the Franciscan, AGU Fall Meeting, New Orleans, LA, December 2017.
Hoover, W., Penniston-Dorland, S., Bebout, G. (2017), Lithium mobility during dehydration, fact or fiction?: Insights from Li isotopes in Alpine metasedimentary rocks, GSA Annual Meeting, Seattle, WA, October 2017.
Hoover, W., Page, F.Z., Schulze, D., Kitajima, K. and Valley, J. (2014), Are Colorado Plateau Eclogite Xenoliths Franciscan?: Oxygen Isotope Evidence From Zoned Garnet, AGU Fall Meeting, San Francisco, CA, December 2014.
Hoover, W., Penniston-Dorland, S., Piccoli, P. and Kylander-Clark, A., (2023), Reaction-induced porosity in an eclogite-facies vein selvage (Monviso Ophiolite, W. Alps): Textural evidence and in situ trace elements and Sr isotopes in apatite, Journal of Petrology 64 (1), egac128. https://doi.org/10.1093/petrology/egac128
Hoover, W., Condit, C., Lindquist, P., Moser, A and Guevara, V., (2022a), Episodic slow slip hosted by talc-bearing metasomatic rocks: High strain rates and stress amplification in a chemically reacting shear zone, Geophysical Research Letters 49 (21), e2022GL101083. https://doi.org/10.1029/2022GL101083
Hoover, W., Penniston-Dorland, S., Baumgartner, L., Bouvier, A.-S. and Dragovic, B., (2022b), Episodic fluid flow in an eclogite-facies shear zone: Insights from Li isotope zoning in garnet, Geology 50, 746-750. https://doi.org/10.1130/G49737.1
Hoover, W., Penniston-Dorland, S., Baumgartner, L., Bouvier, A.-S., Baker, D., Dragovic, B. and Gion, A., (2021), A method for SIMS analysis of lithium isotopes in garnet: The utility of glass reference materials, Geostandards and Geoanalytical Research 45, 477-499. https://doi.org/10.1111/ggr.12383
Hoover, W., Page, F.Z., Schulze, D., Kitajima, K. and Valley, J. (2020a), Massive fluid influx beneath the Colorado Plateau (USA) related to slab removal and diatreme emplacement: Evidence from oxygen isotope zoning in eclogite xenoliths, Journal of Petrology 61. https://doi.org/10.1093/petrology/egaa102
Barnes, J., Penniston-Dorland, S., Bebout, G., Hoover, W., Beaudoin, G. and Agard, P. (2019), Chlorine and lithium behavior in metasedimentary rocks during prograde metamorphism: A comparative study of exhumed subduction complexes (Catalina Schist and Schistes Lustrés), Lithos 336-337, 40-53. https://doi.org/10.1016/j.lithos.2019.03.028
Publications in prep
Hoover, W., Condit, C., Moser, A, Mulcahy, S., Pike, C., Lindquist, P., and Guevara, V., (in prep), Forming a slow slipping subduction interface: P-T-t-X history of metasomatic rocks.
Hoover, W., Penniston-Dorland, S., Teng, F.-Z., (in prep), Fault-valve-style fluid flow at the subduction interface: Lithium chronometry of amphibolite-facies mélange blocks (Catalina Schist, CA).
Theses
Hoover, W. (2021), Characterizing the duration, periodicity and chemical impact of fluid transport in the subducting slab: Insights from isotope geochemistry of high-pressure metamorphosed oceanic crust, University of Maryland PhD dissertation, p. 306.
Hoover, W. (2014), Eclogites and eclogites: Oxygen isotope evidence of a shared subduction origin for Franciscan eclogites and Moses Rock eclogite xenoliths, Oberlin College Undergraduate Honors Thesis, p. 68.
Invited talks
“Subduction zone seismicity hosted by chemically-reacting rocks”, University of Illinois, Chicago, Department of Earth and Environmental Science, March 2023.
“Subduction zone seismicity hosted by chemically-altered rocks”, Occidental College, Department of Geology Seminar, November 2022.
“Chemically-reacting shear zones and subduction zone seismicity”, Central Washington University, Geology Seminar Series, November 2022.
“Chemo-mechanical interactions at the subduction interface: Insights from the rock record on Pimu/Catalina Island, CA”, University of Washington, Seismolunch, March 2022.
“Episodic fluid flow in an eclogite-facies shear zone: Insights from Li isotope zoning in garnet”, University of Washington, Earth and Space Science Colloquium, October 2021.
“Episodic fluid transport in a subduction shear zone: Application of a novel in situ method for Li isotope measurement”, University of Southern California Lithospheric Dynamics Seminar, September 2021.
“Episodic fluid transport in a subduction shear zone: Application of a novel in situ method for Li isotope measurement”, E-FIRE Research Showcase, April 2021.
“Fluid history of an eclogite-facies apatite vein: Evolving fluid composition or multiple sources”, University of Lausanne Petrology Seminar, November 2019.
Conference abstracts
Easthouse, G.*, Hoover, W., Teng, F., Condit, C., Berg, A., and Pike, C. (2023), Tracing the formation of talc rich mélange rocks with magnesium isotopes, GSA Cordilleran Section Meeting, Reno, NV, May 2023.
Hoover, W., Condit, C., Moser, A, Mulcahy, S., Pike, C., Lindquist, P., and Guevara, V., (2023), Forming a slow slipping subduction interface: P-T-t-X history of metasomatic rocks, GSA Cordilleran Section Meeting, Reno, NV, May 2023.
Aikin, N., Hoover, W. and Condit, C. (2022), Boots on the Ground: Going Beyond Land Acknowledgements with the Heron's Nest Land Back Project, AGU Fall Meeting, Chicago, IL, December 2022.
Pike, C., Hoover, W. and Condit, C. (2022), Metasomatism and Fluid Infiltration of Actinolite, Talc-, and Chlorite-Actinolite Schist during Subduction on Santa Catalina Island, California: An Isocon Analysis, AGU Fall Meeting, Chicago, IL, December 2022.
Hoover, W., Condit, C., Moser, A., Lindquist, P. and Guevara, V., (2022c), The role of metasomatism in episodic tremor and slow slip: stress and strain rate variations in a chemically reacting shear zone, GSA Annual Meeting, Denver, CO, October 2022
Lindquist, P., Condit, C., Guevara, V., Hernández Uribe, D. and Hoover, W., (2022), Fluid release and silica metasomatism near the plate interface beneath Guerrero, Mexico: predicting talc production at the conditions of episodic tremor and slow slip, GSA Annual Meeting, Denver, CO, October 2022
Hoover, W., Condit, C., Moser, A., Lindquist, P. and Guevara, V., (2022d), Stress and strain rate variations in a chemically reacting shear zone: the role of metasomatism in producing slow slip and tremor, Goldschmidt Conference, Honolulu, HI, July 2022.
Hoover, W. and Penniston-Dorland, S. (2021), Rapid, uniform fluid flow at the subduction interface: Lithium chronometry of amphibolite-facies mélange blocks (Catalina Schist, CA), AGU Fall Meeting, December 2021.
Hoover, W., Penniston-Dorland, S., Baumgartner, L., Bouvier, A.-S. and Dragovic, B. (2020b), Cyclic fluid flow in a high-pressure shear zone: Insights from Li isotope zoning in garnet, AGU Fall Meeting, December 2020.
Boak, A., Hoover, W., Penniston-Dorland, S., Piccoli, P. and Ash, R. (2019), Understanding fluid behavior in Monviso using chlorite-bearing altered eclogites from the Lower Shear Zone, AGU Fall Meeting, San Francisco, CA, December 2019.
Hoover, W., Penniston-Dorland, S. and Piccoli, P. (2019a), Multiple fluid compositions preserved in an eclogite-facies apatite vein (Monviso Ophiolite, Western Alps), Emile Argand Conference on Alpine Geological Studies, Sion, Switzerland, September 2019.
Hoover, W., Penniston-Dorland, S., and Piccoli, P. (2019b), Low-salinity fluids in an intra-slab shear zone: Insights into fluid salinity from apatite in the Monviso Ophiolite, GeoPRISMS TEI, San Antonio, TX, February 2019.
Goltz, A., Hoover, W., Page, F. Z., Moreira, H., Storey, C., Kitajima, K. and Valley, J. (2017), Microanalyzing Metasomatism: Correlative Microanalysis of Trace Elements and Oxygen Isotopes in the Franciscan, AGU Fall Meeting, New Orleans, LA, December 2017.
Hoover, W., Penniston-Dorland, S., Bebout, G. (2017), Lithium mobility during dehydration, fact or fiction?: Insights from Li isotopes in Alpine metasedimentary rocks, GSA Annual Meeting, Seattle, WA, October 2017.
Hoover, W., Page, F.Z., Schulze, D., Kitajima, K. and Valley, J. (2014), Are Colorado Plateau Eclogite Xenoliths Franciscan?: Oxygen Isotope Evidence From Zoned Garnet, AGU Fall Meeting, San Francisco, CA, December 2014.
I am currently working and living on unceded lands of the Coast Salish peoples that touch the shared waters of the Duwamish, Puyallup, Suquamish, Tulalip, and Muckleshoot. Much of my research has been carried out on lands of the Tongva, Diné, and Piscataway peoples. I respectfully and humbly thank the Coast Salish, Tongva, Diné, and Piscataway ancestors, elders, and citizens for their ongoing stewardship of these lands and affirm their sovereignty in the face of continued dispossession and settler-colonialism
