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Katja Meyer

Associate Professor of Environmental Science

Headshot of Katja Meyer

Contact Information

Salem Campus

Collins Science Center 215
900 State Street
Salem  Oregon  97301


  • Ph.D., Geosciences and Biogeochemistry, The Pennsylvania State University
  • B.A., Geology, Carleton College


Professional Interests

I am a broadly trained geologist with interest in the interactions between life, the geochemical environment, and climate. My research is focused on understanding the Earth system feedbacks that are important to ocean deoxygenation. Most of my work has centered on understanding the development of anoxic and sulfidic conditions during the end-Permian mass extinction and recovery. I use a range of tools, including numerical modeling and isotope geochemistry.


Jones, C., Fike, D., and Meyer, K.M. (2018) SIMS methodology for isotopic ratio analysis of micro-grains in thin sections: True grain size estimation and deconvolution of inter-grain and intra-grain radial gradients, Geostandards and Geoanalytical Research, doi:10.1111/ggr.12247.

Meyer, K.M., Ridgwell, A., and Payne, J.L. (2016) The influence of the biological pump on ocean chemistry: implications for long-term trends in marine redox chemistry, the global carbon cycle, and the evolution of marine animal ecosystems, Geobiology, doi:10.1111/gbi.12176.

Lehrmann, D.J., Bentz, J.M., Wood, T., Goers, A., Dhillon, R., Akin, S, Li, X.W., Payne, J.L., Kelley, B.M., Meyer, K.M., Schaal, E.K., Suarez, M.B., Yu, M.Y., Qin, Y.J., Li,R.X., Minzoni, M., Henderson, C.M. (2015) Environmental controls on the genesis of marine microbialites and dissolution surface associated with the end-Permian mass extinction: New sections and observations from the Nanpanjiang Basin, south China, Palaios, 30, 529-552.

Lehrmann, D.J., Stepchinksi, L., Altiner, D., Orchard, M.J., Montgonery, P., Enos, P., Ellwood, B.B., Bowring, S.A., Ramezani, J., Wang, H., Wei, J.Y., Griffiths, J.D., Minzoni, M., Schaal, E.K., Li, X., Meyer, K.M., Payne, J.L. (2015) An integrated biostratigraphy (conodonts and foraminifers) and chronostratigraphy (paleomagnetic reversals, magnetic susceptibility, elemental chemistry, carbon isotopes, and geochronology) for the Permian-Upper Triassic strata of Guandao section, Nanpanjiang Basin, south China, Journal of Asian Earth Sciences, 108, 117-135.

Schaal, E.K., Meyer, K.M., Lau, K.V., Silva-Tamayo, J.C., and Payne, J.L. (2015) Oceanic anoxia during the Permian-Triassic transition and links to volcanism, in Schmidt, A., Fristaad, K.E., and Elkins-Tanton, L.T., eds. Volcanism and Global Environmental Change: Cambridge, United Kingdom, Cambridge University Press, p. 275-290.

Minzoni, M., Lehrmann, D.J., Payne, J.L., Enos, P., Wei, J.Y., Kelley, B.M., Li, X.W., Schaal, E.K., Meyer, K.M., Montgomery, P., Goers, A., and Wood, T. (2013) Triassic Tank: Platform margin and slope architecture in space and time, Nanpanjiang Basin, South China, in Playton, T., Harris, M., and Verwer, K., eds. Deposits, Architecture and Controls of Carbonate Margin, Slope, and Basinal Settings: SEPM Special Publication, 105, p. 83-113. doi: 10.2110/sepmsp.105.10.

Meyer, K.M., Yu, M., Lehrmann, D., van de Schootbrugge, B., and Payne, J.L. (2013) Constraints on Early Triassic carbon cycle dynamics from paired organic and inorganic carbon isotope records, Earth and Planetary Science Letters, doi: 10.1016/j.epsl.2012.10.035.

Meyer, K.M. (2012) Slowed by sulphide, Nature Geoscience, 5, 593-594, doi: 10.1038/ngeo1566.

Meyer, K.M., Kump, L.R., Macalady, J.L., Schaperdoth, I., and Freeman, K.H. (2011) Carotenoid biomarkers as an imperfect reflection of the anaerobic phototrophic community in meromictic Fayeteville Green Lake, Geobiology, 9(4), 321-329.

Meyer, K.M., Yu, M., Jost, A.B., and Payne, J.L. (2011) Carbon isotope evidence for a vigorous biological pump in the aftermath of end-Permian mass extinction, Earth and Planetary Science Letters, 302(3-4), 378-384.

Meyer, K.M., Ridgwell, A., and Kump, L.R. (2008) Biogeochemical controls on photic zone euxinia during the end-Permian mass extinction, Geology, 36(9), 747-750.

Meyer, K.M., and Kump, L.R. (2008) Oceanic euxinia in Earth history: Causes and consequences, Annual Review of Earth and Planetary Sciences, 36, 251-288.

Macalady J.M., Lyon E., Koffman B., Albertson L.K., Meyer K., Galdenzi S., and Mariani, S. (2006) Dominant microbial populations in limestone-corroding stream biofilms, Frasassi Cave System, Italy, Applied and Environmental Microbiology, 72(8), 5596-5609.

Lyon E., Koffman B., Meyer K., Cleaveland L., Mariani S., Galdenzi S., and Macalady J.L. (2004) Geomicrobiology of the Frasassi Caves. In Frasassi 1989-2004: Gli sviluppi nella ricerca (S. Galdenzi, ed.), pp. 152-157.

Willamette University

Environmental Science

Willamette University
900 State Street
Salem Oregon 97301 U.S.A.