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Eric Stewart studying Precambrian geology in the field

Photo by Esther Stewart

Eric Stewart

Geologist

Contact: Phone (608) 262-9403 | Email eric.stewart@wisc.edu

I am interested in the Precambrian to Paleozoic history of bedrock folds, faults, and fractures in Wisconsin, and how these structures affect Wisconsin’s natural resources today. Most of my research is based on the construction of geologic maps. I use new geologic mapping to solve problems in the geosciences from the plate tectonics scale (such as how subduction zones initiate) to the local scale (e.g. the probability of detecting arsenic across a township).

Current projects

I am currently working on a bedrock geologic map of Grant County, where I am trying to assess how folding and fracturing modifies the way groundwater flows and behaves with respect to Paleozoic bedrock units. In looking at these hydrostratigraphic characteristics, I am investigating whether folding and fracturing increases or decreases susceptibility to surface contaminants, and whether fracture networks mobilize and redistribute aquifer contaminants such as arsenic, potentially altering the probability of arsenic detection in groundwater wells.

I am also actively mapping in the Precambrian rocks of the Baraboo area, where we are piecing together the ancient thrust-belt that formed during Precambrian mountain building.

My current research projects can be explored through this story map:

Image link to story map of Eric Stewart's research projects

View story map

Peer-reviewed publications

  • Stewart, E., Newman, J., Tikoff, B., Donnelly, S., German, L., Chatzaras, V., Lamb, W.M., Miller, B., and Kruckenberg, S.C., 2019, Multiple coupled tectonic and melt-migration events recording subduction initiation, Dun Mountain Ophiolite, New Zealand: Geological Society, London, Memoirs, v. 49, p. 93–117. https://doi.org/10.1144/M49.5
  • Jugum, D., Stewart, E., Palin, J.M., Mortimer, N., Norris, R., and Lamb, W., 2019, Correlations between a heterogeneous mantle and multiple stages of crustal growth, a review of the Dun Mountain Ophiolite, New Zealand: Geological Society, London, Memoirs, v. 49, p. 75–92. https://doi.org/10.1144/M49.3.
  • Stewart, E.D., Kingsbury-Stewart, E., Walker, A., and Zambito, J., 2018, Revisiting the Paleoproterozoic Baraboo interval in southern Wisconsin: Evidence for syn-depositional tectonism along the south-central margin of Laurentia: Precambrian Research, v. 314, p. 221–239.
  • Link, P.K., Stewart, E.D., Steel, T. Sherwin, J., Hess, L.R., and McDonald, C., 2016, Detrital zircons in the Mesoproterozoic upper Belt Supergroup in the Pioneer, Beaverhead, and Lemhi Ranges, Montana and Idaho: The Big White arc in MacLean, J.S., and Sears, J.W., (eds.), Belt basin: Window to Mesoproterozoic earth: Geological Society of America Special Papers v. 522, https://doi.org/10.1130/2016.2522(07).
  • Stewart, E.D., Lamb, W., Newman, J., and Tikoff, B., 2016, The petrologic and geochemical evolution of early forearc mantle lithosphere: an example from the Red Hills ultramafic complex, New Zealand: Journal of Petrology, v. 57, p. 751–776. https://doi.org/10.1093/petrology/egw017.
  • Stewart, E.D., Holyoke III, C.W., and Kronenberg, A.K., 2013, High pressure deformation experiments using solid confining media and Griggs piston-cylinder methods: Appraisal of stress and deformation in talc assemblies: Tectonophysics, v. 588, p. 171–178, https://doi.org/10.1016/j.tecto.2012.12.004.
  • Stewart, E.D., Link, P.K., Fanning, C.M., Frost, C.D., and McCurry, M., 2010, Paleogeographic implications of non-North American sediment in the Mesoproterozoic upper Belt Supergroup and Lemhi Group, Idaho and Montana, USA: Geology, v. 38, p. 927-930. https://doi.org/10.1130/G31194.1

 

Geologic maps

  • Stewart, E.D., and Kingsbury-Stewart, E.K., in preparation, Geologic map of the Rock Springs 7.5-minute quadrangle, Sauk County, Wisconsin, Wisconsin Geological and Natural History Survey, scale 1:24,000.
  • Kingsbury-Stewart, E.K., and Stewart, E.D., in review, Geologic map of the Baraboo 7.5-minute quadrangle, Sauk County, Wisconsin, Wisconsin Geological and Natural History Survey, scale 1:24,000.
  • Stewart, E.D., and Kingsbury-Stewart, E.K., in press, Geologic map of the North Freedom 7.5-minute quadrangle, Sauk County, Wisconsin, Wisconsin Geological and Natural History Survey, scale 1:24,000.
  • Stewart, D.E., Stewart, E.D., and Lewis, R.S., 2017, Geologic map of the Burntlog Creek Area, Valley County, Idaho: Idaho Geological Survey, Geologic Map DWM-180, scale 1:36,000.  https://www.idahogeology.org/product/dwm-180
  • Stewart, D.E. Stewart, E.D., Lewis, R.S., Weppner, K.N., Isakson, V.H., 2016, Geologic map of the Stibnite quadrangle, Valley County, Idaho: Idaho Geological Survey GM-51, scale 1:24,000. https://www.idahogeology.org/product/gm-51
  • Stewart, E.D., Steel, T., Stewart, D.E., and Link, P.K., 2014, Geologic map of the Gibbonsville, Shewag Lake, and Allan Mountain quadrangles, and parts of the Lost Trail Pass and Big Hole Pass quadrangles, Lemhi County, Idaho, and Beaverhead and Ravalli Counties, Montana: Idaho Geological Survey, Technical Report T-14-2, scale 1:40,000. https://www.idahogeology.org/product/t-14-2
  • Lewis, R.S., Othberg, K.L., Stanford, L.R., Burmester, R.F., Lonn, J.D., Stewart, D.E., and Stewart, E.D., 2014, Geologic map of the Sal Mountain quadrangle, Lemhi County, Idaho: Idaho Geological Survey DWM 170, scale 1:24,000. https://www.idahogeology.org/product/DWM-170
  • Stewart, D.E., Lewis, R.S., Stewart, E.D., and Link, P.K., 2013, Geologic map of the central and lower Big Creek Drainage, Central Idaho: Idaho Geological Survey DWM-161, scale 1:75,000. https://www.idahogeology.org/product/dwm-161
  • Lewis, R.S., Othberg, K.L., McFaddan, M.D., Burmester, R.F., Stewart, D.E., Stanford, L.R., and Stewart, E.D., 2013, Geologic map of the Williams Lake quadrangle, Lemhi County, Idaho: Idaho Geological Survey DWM-162, scale 1:24,000. https://www.idahogeology.org/product/DWM-162
  • Lewis, R.S., Stewart, D.E., and Stewart, E.D., 2012, Geologic map of the Big Creek quadrangle, Idaho and Valley Counties, Idaho: Idaho Geological Survey DWM-143, scale 1:24,000. https://www.idahogeology.org/product/dwm-143
  • Lewis, R.S., Schimdt, K.L., Stewart, D.E., Othberg, K.L., Kauffman, J.D., and Stewart, E.D., 2011, Geologic map of the John Day Mountain quadrangle, Idaho County, Idaho: Idaho Geological Survey DWM-128, scale 1:24,000. https://www.idahogeology.org/product/DWM-128
  • Stewart, E.D., Link, P.K., and Rodgers, D.W., 2010, Geologic map of the Allan Mountain quadrangle, Lemhi County, Idaho and Ravalli County, Montana: Idaho Geological Survey Technical Report T-10-1, scale 1:24,000. https://www.idahogeology.org/product/t-10-1