MS Student 2016-2018
Katharine was an MS student in the P-mag Lab from 2016-2018, co-advised by Joe Stoner and CEOAS volcanologist Shan de Silva. Her research used radiocarbon and paleomagnetic secular variation as stratigraphic tools to investigate uplifted lake sediments on the resurgent Toba Caldera in Indonesia. Her work has provided new insight to the style of resurgence of the caldera. Broadly, Katharine is interested in all things volcanic, including volcanic hazards, resurgence, caldera evolution, supereruptions, volcanic tremor, magma degassing, and the application of paleomagnetism towards volcanic problems. She now works as the lab manager for the Oregon State P-mag Lab and teaches Earth Science classes at Linn-Benton Community College.
Dr. Brendan Reilly
PhD Student 2013-2018
Brendan was a PhD student in the P-mag Lab from 2013 to 2018 after completing an MS at Montclair State University. His PhD work focused on chronostratigraphic modeling of a wide range of challenging to date sediments, through the use of paleomagnetism in concert with other stratigraphic methods and from a regional perspective through the use of networks of sedimentary archives. His sites included terrestrial archives from Western North America, Bengal Fan Sediments, and Galciomarine Sediments from Petermann Fjord. These stronger chronologies provided new insight to geomagnetic, glacial, and depositional Earth system histories. Brendan is now a Research Associate (Postdoc) at Oregon State University.
You can read about some of Brendan’s PhD work here:
Reilly, B., Stoner, J., Selkin, P., Savian, J., Meynadier, L., (2018) Data report: Paleomagnetic directions from IODP Expedition 354, Hole U1451A, Cores 23H and 24H, in Bengal Fan. Proceedings of the International Ocean Discovery Program, 354: College Station, TX.
Reilly, B.T., J.S. Stoner, J. Wiest, (2017) SedCT: MATLABTM tools for standardized and quantitative processing of sediment core computed tomography (CT) data collected using a medical CT scanner, Geochemistry, Geophysics, Geosystems, 18.
Ann E. Morey (Ross)
Sr. Faculty Research II 2014-2016
Ann was a Senior Faculty Research II with the P-mag Lab from 2014-2016 and managed the day to day operations of the P-mag Lab. Ann is now a PhD candidate at Oregon State University, studying the paleo-seismic records of Oregon lake sediments. Her research objectives include: (1) Attempt to differentiate between earthquake-triggered deposits from those resulting from other types of disturbances such extreme floods and post-fire erosion using the sedimentary records of small lakes in the Pacific Northwest,;(2) Determine the mechanisms that control deposit characteristics; (3) Estimate minimum intensity and spatial pattern of strong ground motions resulting from a great earthquake; and (4) Reconstruct the earthquake history at these locations.
Dr. Leah Ziegler
NSF Earth Science Post-doctoral Fellow 2011-2013; Postdoctoral Research Assistant (2013-2014)
Leah was a Postdoc at the P-mag Lab from 2011-2014. Leah was interested in how geomagnetism could be used to study deep Earth Processes and Earth History. During her postdoc, Leah explored time and spatial variations in paleomagnetic field variations and explored the implications of a long-lived basal magma ocean as a means of generating Earth’s magnetic field in early Earth History. Leah now lives in San Diego and is a Staff Algorithm Engineer at Dexcom.
You can read about Leah’s work on Gulf of Alaska environmental magnetism and the long-lived basal magma ocean here:
Carlson, A., Kilmer, Z., Ziegler, L., Stoner, J., Wiles, G., Starr, K., Walczak, M., Colgan, W., Reyes, A., Leydet, D., Hatfield, R., (2017) Recent retreat of Columbia Glacier, Alaska: Millennial context, Geology, 45 (6), 547-550.
Dr. Sarah Strano
PhD Student 2008-2014
Sarah was a PhD student in the P-mag Lab from 2008-2014. Part of Sarah’s PhD work focused on improving our understanding of deep sea sediment magnetism, particularly using high resolution radiocarbon chronologies and paleomagnetic measurements to assess and quantify the influence of post-depositional remanent magnetization acquisition processes from a wide range of depositional environments. With the insight gained into these processes, Sarah worked to improve regional reconstructions of the past geomagnetic field and investigated how these magnetic records are affected by regional environmental changes. Sarah now lives in Seattle, WA with her family and has worked as a Data Scientist/Software Developer.
You can read Sarah’s thesis here:
Dr. Chuang Xuan
Institutional Postdoctoral Research Associate 2010-2013
Chuang was a postdoc in the P-mag Lab from 2010-2013 after completing his PhD at the University of Florida. His interests include: (1) Reconstruction and understanding of the temporal and spatial variation of the geomagnetic field on various scales; (2) High-resolution chronostratigraphy and paleoenvironment resconstructions using paleomagnetic and rock magnetic records; (3) Evidence and causes of the possible relationships among Earth’s orbital parameters, magnetic field, and climate on various time scales; (4) Application of advanced statistic and mathematic methods on solving geomagnetism, paleomagnetism, and paleoclimate related problems, and the development of related software.
Chuang is now a Lecturer within the Ocean and Earth Science, National Oceanography Centre at the University of Southampton.
You can read about Chuang’s work on deconvolution of data from the OSU’s u-channel magnetometer here:
Oda, H., Xuan, C., (2014) Deconvolution of continuous paleomagnetic data from pass-through magnetometer: A new algorithm to restore geomagnetic and environmental information based on realistic optimization, Geochemistry, Geophysics, Geosystems, 15, (10), 3907-3924.
M.S. Student 2010-2013
Jason completed his Masters degree in Marine Geology and Geophysics in the College of Oceanic and Atmospheric Sciences at OSU in 2013. Working with PI Joseph Stoner and Dr. Mark Abbott at the University of Pittsburgh, he reconstructed the Holocene geomagnetic field of the Arctic by analyzing marine and lake-core sediments sampled from a transect around the Arctic Circle mostly focusing on Burial Lake in northwest Alaska in the Brooks Range. The 37,000 year record provided a detailed record of the Earth’s magnetic field and its ever-changing orientation and intensity. This project helped to understand spatial and temporal patterns of the magnetic field, and how these patterns affect climate and other earthly processes. Jason now works for David Evans & Associates in Portland, OR.
You can read about some of Jason’s MS work in Quaternary Science Reviews:
Dorfman, J.M., J.S. Stoner, M.S. Finkenbinder, M.B. Abbott, C. Xuan, and G. St-Onge (2015) A 37,000-year environmental magnetic record of aeolian dust deposition from Burial Lake, Arctic Alaska, Quaternary Science Reviews, 128, 81-97.
Dr. Maureen Walczak (nee Davies)
PhD Student 2006-2011
Maureen completed her PhD in 2011, being co-advised by Joe Stoner and CEOAS paleoceanographer Alan Mix. Her PhD work included the study of the paleoceanographic, paleoclimate, and paleomagnetic histories recorded in the sediments of the Gulf of Alaska. In addition to paleomagnetic methods, Maureen use a diverse set of tools including isotope geochemistry, sedimentology, and radiocarbon. Following graduation, Maureen was a Super Science Fellow at the Australia National University from 2011 to 2015 and worked on novel dating methods for marine sediments. She is now a Research Associate (postdoc) at Oregon State University.
You can read about Maureen’s PhD work in Paleoceanography and EPSL:
Walczak, M.H., J.S. Stoner, A.C. Mix, J. Jaeger, G.P. Rosen, J.E.T. Channell, D. Heslop, & C. Xuan 2017: A 17,000 yr paleomagnetic secular variation record from the southeast Alaskan margin: Regional and global correlations. Earth and Planetary Science Letters, 477, 177-189.
Davies-Walczak, M.H., A.C. Mix, J.S. Stoner, J.R. Southon, M. Cheseby, & C. Xuan (2014) Late Glacial to Holocene radiocarbon constraints on North Pacific Intermediate Water ventilation and deglacial atmospheric CO2 sources, Earth and Planetary Science Letters, 397, 57-66.
Davies, M. H., A. C. Mix, J. S. Stoner, J. A. Addison, J. Jaeger, B. Finney, and J. Wiest (2011) The deglacial transition on the Southeastern Alaska Margin: meltwater input, sealevel rise, marine productivity, and sedimentary anoxia. Paleoceanography, 26, PA2224.