WGNHS
Wisconsin Geological and Natural History Survey

Eric Stewart

Position title: Bedrock Geologist

Pronouns: he/him

Email: eric.stewart@wisc.edu

Phone: (608) 262-9403

Eric Stewart with green tree branches in background

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

My current projects can be explored through this interactive map:

View interactive map

Read about my work

Journal article publications

  • Stewart, E.D., Stewart, E.K., Bradbury, K.R., and Fitzpatrick, W., 2021, Correlating Bedrock Folds to Higher Rates of Arsenic Detection in Groundwater, Southeast Wisconsin, USA: Groundwater, v. 59, p. 829-838.
  • Stewart, E.K., Brengman, L.A., and Stewart, E.D., 2021, Revised Provenance, Depositional Environment, and Maximum Depositional Age for the Baraboo (< ca. 1714 Ma) and Dake (< ca. 1630 Ma) Quartzites, Baraboo Hills, Wisconsin: The Journal of Geology, v. 129, p. 1-31.
  • 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., Stewart, E.K., and Fitzpatrick, W.A., in review, Geologic map of the Durwards Glen 7.5-minute quadrangle, Sauk and Columbia counties, Wisconsin: Wisconsin Geological and Natural History Survey open-file report, scale 1:24,000.
  • Bodjak-Yates, I., Stewart, E.D., and Bremmer, S., in press, Geologic map of the Dells of the Wisconsin River State Natural Area, Wisconsin: Wisconsin Geological and Natural History Survey open-file report, scale 1:12,000.
  • Stewart, E.D., Mauel, S.W., and Batten, W., in press, Geologic map of the Stitzer and western part of the Montfort 7.5-minute quadrangles, Grant County, Wisconsin: Wisconsin Geological and Natural History Survey open-file report, scale 1:24,000.
  • Fitzpatrick, W.A., and Stewart, E.D., in press, Geologic map of the Highland West and Highland East 7.5-minute quadrangles, Grant and Iowa Counties, Wisconsin: Wisconsin Geological and Natural History Survey Map series, scale 1:24,000.
  • Bremmer, S.E., Stewart, E.D., Batten, W.G., Kusick, A.R., and McNall, N., in press, Geologic map of the Fennimore and Mount Hope 7.5-minute quadrangles, Grant County, Wisconsin: Wisconsin Geological and Natural History Survey open-file report, scale 1:24,000.
  • Stewart, E.D., Mauel, S.W., Graham, G.E., and Carson, E.C., 2022, Geologic map of the Bloomington and Brodtville 7.5-minute quadrangles, Grant County, Wisconsin: Wisconsin Geological and Natural History Survey open-file report 2022-03, scale 1:24,000. https://wgnhs.wisc.edu/catalog/publication/000991
  • Stewart, E.D., Mauel, S.W., Carson, E.C., and Graham, G.E., 2022, Geologic map of the Castle Rock and Long Hollow 7.5-minute quadrangles, Grant County, Wisconsin: Wisconsin Geological and Natural History Survey open-file report 2022-01, scale 1:24,000. https://wgnhs.wisc.edu/catalog/publication/000988
  • Stewart, E.D., and Kingsbury-Stewart, E.K., 2021, Geologic map of the Rock Springs 7.5-minute quadrangle, Sauk County, Wisconsin, Wisconsin Geological and Natural History Survey, scale 1:24,000. https://wgnhs.wisc.edu/catalog/publication/000977
  • Kingsbury-Stewart, E.K., and Stewart, E.D., 2021, Geologic map of the Baraboo 7.5-minute quadrangle, Sauk County, Wisconsin, Wisconsin Geological and Natural History Survey, scale 1:24,000. https://wgnhs.wisc.edu/catalog/publication/000978
  • Stewart, E.D., and Kingsbury-Stewart, E.K., 2020, Geologic map of the North Freedom 7.5-minute quadrangle, Sauk County, Wisconsin, Wisconsin Geological and Natural History Survey, scale 1:24,000. https://wgnhs.wisc.edu/catalog/publication/000973
  • 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

 

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