About

PreCAmbrian Processes Lab

Welcome.

We are the Precambrian Processes Lab at the University of Minnesota Duluth. The lab is run by Dr. Latisha Brengman – a cross-disciplinary geoscientist studying Precambrian sedimentary and hydrothermal systems using an integrated sedimentological and geochemical approach.

You can learn more about our group projects under the “Projects” page. We are actively recruiting graduate and undergraduate students and always looking forward to new collaborations. Please reach out to lbrengma@d.umn.edu for more information or to connect!

EDUCATION

Ph.D. (2015), University of Tennessee, Knoxville; major field: Earth and Planetary Sciences; Advisor: Dr. C. M. Fedo; Dissertation: Geochemical and isotopic characteristics of Precambrian primary and secondary chert. Degree conferred 8 May 2015.

B.A. (2009), Northwestern University; major field: Geology, with honors; Advisor Dr. M. T. Hurtgen; Honors Senior Thesis: The sulfur isotope composition of 800 Ma Neoproterozoic seawater as recorded in the Bitter Springs Formation, Australia; Degree conferred 15 June 2009.

PROFESSIONAL EXPERIENCE

Assistant Professor, Department of Earth and Environmental Sciences, University of Minnesota Duluth, MN (2015 – present).

Research Associate, Wisconsin Geological and Natural History Survey; Collaborator: E. Stewart; Projects: Preliminary textural and geochemical characterization of the <1.71 Ga Freedom Formation, Baraboo, WI; and bedrock mapping of the Baraboo quartzite, Seeley Slate, and Freedom Formation (2019 – present).

Internship, Exxon Mobil Research Company, Houston, TX, Non-conventional reservoir group. Collaborator, Mentor: W. Heins. Project: Predicting the character and grain size distribution of material produced during chemical weathering of a known provenance. (May – August, 2015).

^Lecturer, Research Associate, and Teaching Assistant, Department of Earth and Planetary Sciences, University of Tennessee, Knoxville (2010 – 2015).

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AWARDS

  • Young Teacher Award, Swenson College of Science and Engineering, University of Minnesota Duluth, 2019
  • ^Chancellor’s Citation for Extraordinary Professional Promise, University of Tennessee, 2014

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ANALYTICAL EXPERTISE

My research focuses on understanding Precambrian depositional and post-depositional processes. Our projects aim to reconstruct evolving seawater chemistry in deep time, with a focus on the nascent silica cycle. To accomplish this goal my lab group combines traditional and non-traditional sedimentological and geochemical tools that span from the field to micron-scale sample analysis. Analytical methods include the following:

Secondary Ion Mass Spectrometry (SIMS). Primary measurements: silicon and oxygen isotopes. Visiting Research Associate, Department of Geosciences, Swedish Museum of Natural History, Stockholm, Sweden; Collaborator: Dr. M. J. Whitehouse; Project: High-resolution, in-situ silicon isotope analysis of silicified volcanic rocks and Archean banded iron formation via Secondary Isotope Mass Spectrometry (SIMS). (2013 – present).

Electron probe microanalysis (EPMA). Primary measurements: mineral imaging and chemical compositions. Visiting Research Associate, Department of Geosciences, University of Wisconsin – Madison; Collaborators: Dr. J. Fournelle, Dr. A. Moy; Project: Preliminary textural and geochemical characterization of silicate and carbonate phases the <1.71 Ga Freedom Formation, Baraboo, WI. (2017 – present).

Isotope ratio mass spectrometry (IRMS). Primary measurements: dual collection of silicon and oxygen isotopes on the same sample. Visiting Research Associate, Western University, Stable Isotope Geochemistry Lab, London, Ontario; Collaborator: Dr. N. R. Banerjee; Project: Bulk silicon isotope analysis of silicified volcanic rocks and Archean banded iron formation via Isotope Ratio Mass Spectrometry (IRMS).(2013 – present).

Portable x-ray fluorescence instrumentation (pXRF). Primary measurements: powdered rock, soil and sediment, outcrop, drill core, field analysis of hydrothermal fluids. Precambrian Processes Lab at the University of Minnesota Duluth. Projects: (1) Field and laboratory analysis of drill core, outcrop, and hydrothermal features; (2) Calibration development (2020 – present).

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PRIMARY FIELD STUDIES

To quantify broad changes in textural and geochemical data from siliceous Precambrian sedimentary and volcano-sedimentary assemblages, my lab focuses on field work spanning a billion years from ~2.7 Ga to <1.71 Ga. We also study modern hydrothermal systems as geochemical analogs we can use to inform interpretations of deep time silica deposits. ***indicates field work initiated after arrival at UMD.

~2.7 Ga Abitibi Greenstone Belt, Canada. (2011 – present). Collaborators: Dr. Pierre Bousquet (Ministry of Energy, Northern Development and Mines, Ontario, Canada), Dr. Philip Fralick (Lakehead University, Canada), Dr. Neil Banerjee (Western University, Canada), Dr. Martin Whitehouse (Swedish Natural History Museum, Stockholm, Sweden), Dr. Christopher Fedo (University of Tennessee), Students: Paul Bielski (Graduate student, Lakehead University, 2020), Dani Stolze (Undergraduate, UMD, 2021).

~2.7 Ga Vermilion District, northern Minnesota***, United States (2017 – present). Collaborators: Dr. Vicki Hansen (UMD), Dr. John Goodge (UMD), Students: Ann Marie Prue (Graduate student: 2020 – 2022), Katie Linderholm (Undergraduate, UMD 2021), Elizabeth Boor (Undergraduate, UMD, 2020), Logan Carpenter (Undergraduate, UMD, 2020), Heidi Krauss (Undergraduate, UMD, 2020), Emily Wojtowicz (Undergraduate, UMD, 2020), Dani Stolze (Undergraduate, UMD, 2021), Paul Bielski (Graduate student, Lakehead University, 2020), Mady David (undergraduate, 2019). Special Permits No. 201988 (2019), 202023 (2020), and 202023 (2021) awarded to L. A. Brengman.

~1.9 Ga Animikie Basin, northern Minnesota***, United States (2016 – present). Collaborators: Dr. Athena Eyster (Massachusetts Institute of Technology), Dr. Jena Johnson (University of Michigan), Dr. Elizabeth Trower (University of Colorado – Boulder), Students: Samuel Duncanson, (Graduate student, UMD, 2018-2020), Kendall Johnson (Undergraduate, UMD, 2019), Anthony Wetzel (Undergraduate, UMD, 2018), Stephen Hanson (Undergraduate, UMD, 2017).

<1.71 Ga Baraboo, Wisconsin***, United States (2017 – present). Collaborator: Esther Stewart (Wisconsin Geological and Natural History Survey). Students: George Segee-Wright (Undergraduate, Hamilton College), Joe Rasmussen (Undergraduate, University of Wisconsin – Madison).

Modern, Yellowstone National Park***, United States (2018 – present). Collaborators: Dr. Jeff Havig (University of Minnesota Twin Cities), Dr. Trinity Hamilton (University of Minnesota Twin Cities).

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CURRENT SUPPORT

NATIONAL COOPERATIVE GEOLOGIC MAPPING PROGRAM – STATEMAP ELEMENT, UNITED STATES GEOLOGICAL SURVEY, “Mapping and Geologic Data of Priority Areas in Wisconsin: Subsurface mapping of the Oronto Group in the Ashland Syncline, northern Wisconsin”, Year 1 (Project 5). PI: Eric Carson (full proposal PI; Wisconsin Geological and Natural History Survey – WGNHS); Esther Stewart (Sub-project 5 PI, WGNHS, Co-I Latisha Brengman). Awarded: June 2021- May 2022. Amount requested to UMD (actual amount awarded may change): $6,757 (Total amount requested: $961,475).

GRANT-IN-AID OF RESEARCH, ARTISTRY, AND SCHOLARSHIP, “Application of a newly developed silicon isotope proxy to sulfide mineral deposit exploration”. PI: Latisha Brengman. University of Minnesota, Office of the Vice President for Research. Awarded, July 2018 – December 31, 2021. Amount Awarded: $27,107.

CHANCELLOR’S SMALL GRANT, “Involving UMD students from across campus to update the museum-quality display cases in Heller Hall and connect to a modern audience.” PI: Latisha Brengman. University of Minnesota. Awarded, May 8, 2020 – December 31, 2021. Amount awarded: $2,999.40.

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PENDING SUPPORT

NASA EXOBIOLOGY, “A stratigraphic, textural, and geochemical investigation of mid-Proterozoic sedimentary manganese enrichment pathways” PI: Latisha A. Brengman

Co-PI: Chad Wittkop (Minnesota State University), Co-I’s; Elizabeth Swanner (Iowa State University), Jeremy Owens (Florida State University), Ioan Lascu (Smithsonian Institution), Ann Bauer (University of Wisconsin Madison), Esther Stewart (WGNHS). Submitted July 6, 2021. Requested: $441,096 to UMD, (Total amount requested: $1,127,149).

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PREVIOUS SUPPORT

GRANT-IN-AID OF RESEARCH, ARTISTRY, & SCHOLARSHIP, Shared instrument category, “Acquisition of a hand-held x-ray fluorescence instrument.” PI: Latisha Brengman, Co-I: John Swenson. University of Minnesota, Office of the Vice President for Research. Awarded, November 2019, Dates active: January 2020 – June 2021. $35,496. Matching funds (50%) were secured separately through a Collegiate Fee proposal.

COLLEGIATE FEE PROPOSAL, “Acquisition of a hand-held x-ray fluorescence instrument for integrated teaching and research in the Earth and Environmental Sciences at UMD.” PI: Latisha Brengman, Co-I: John Swenson. University of Minnesota Duluth. Awarded, July 2019 – June, 2020. $29,042.

RESEARCH INFRASTRUCTURE INVESTMENT PROGRAM, “Reinvestment and Upgrade of the UM Duluth Stable Isotope Analytical Facility”. University of Minnesota, Office of the Vice President for Research. PI: Schreiner, K., Co-I: Latisha Brengman, Steinman, B.A. (Co-I), Dymond, S.F. (Co-I). Funded: July 1, 2018 – June 30, 2019. $184,788.

WISCONSIN DNR, JOINT SOLICITATION FOR GROUNDWATER RESEARCH AND MONITORING PROPOSALS, “Defining the base of the Cambrian aquifer through geophysical modeling of Precambrian topography, Columbia, County, WI”.  PI: Esther Stewart, Collaborator/ Consultant: Latisha Brengman. Funded:  July 1, 2017 to June 30, 2018. $30,747.

GRANT-IN-AID OF RESEARCH, ARTISTRY, & SCHOLARSHIP, Shared instrument category,“Acquisition of a new EDXRF system”. University of Minnesota, Office of the Vice President for Research. PI: Fortini, O. with several others. Primary instrument user/ Collaborator: L.A. Brengman. Funded: January 1, 2017 – June 30, 2018. $87,761.40.

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PEER REVIEWED PUBLICATIONS (since appointment at UMD in 2015) *student authors

Eyster, A., Brengman, L.A., Nichols, C., *Levitt, Z., *Wilcots, J., & Bergmann, K., (2021). A new depositional framework for massive iron formations after the Great Oxidation Event. Geochemistry, Geophysics, and Geosystems (G3). 22, e2020GC009113. DOI: https://doi.org/10.1029/2020GC009113

Brengman, L. A., Fedo, C. M., Whitehouse, M., Banerjee, N., & Jabeen, I., (2021). “Evaluating the geochemistry and paired silicon and oxygen isotope record of quartz in siliceous rocks from the ~3 Ga Buhwa Greenstone Belt, Zimbabwe, a critical link to deciphering the Mesoarchean silica cycle”. Invited research article, Chemical Geology, 577, 120300. DOI: https://doi.org/10.1016/j.chemgeo.2021.120300

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, 129(1), pp.1-31. DOI: https://doi.org/10.1086/713687

Brengman, L.A., Fedo, C. M., Whitehouse, M. J., Banerjee, N. R., & Jabeen, I. (2020). “Textural, geochemical, and isotopic data from silicified rocks and associated chemical sedimentary rocks in the ~ 2.7 Ga Abitibi greenstone belt, Canada: Insight into the role of silicification.” Precambrian Research, Volume 351, December 2020, 105946. DOI: https://doi.org/10.1016/j.precamres.2020.105946

Brengman, L. A., & Fedo, C. M. (2018). “Development of a mixed seawater-hydrothermal fluid geochemical signature during alteration of volcanic rocks in the Archean (∼2.7 Ga) Abitibi Greenstone Belt, Canada.” Geochimica et Cosmochimica Acta, 227, 227-245. DOI: https://doi.org/10.1016/j.gca.2018.02.019

Brengman, L.A., Fedo, C. M., & Whitehouse, M. J. (2016). Micro‐scale silicon isotope heterogeneity observed in hydrothermal quartz precipitates from the >3.7 Ga Isua Greenstone Belt, SW Greenland. Terra Nova, 28.1, 70-75. doi: https://doi.org/10.1111/ter.12192

PUBLISHED REPORTS (since appointment at UMD in 2015) *student authors

Stewart, E. K., *Rasmussen, J., Skalbeck, J., Brengman, L. A., & Gotkowitz, M. (2018). Mapping the base of the Cambrian aquifer through geophysical modeling of Precambrian topography, southern Wisconsin. Wisconsin Geological and Natural History Survey Project Completion Report, 15 p.

Brengman L. A., Heins W.A., & Matthews J.A. (2016). Dissolution and Transformation of Provenance Lithotypes during Initial Sediment Generation with Application to Play-Element Prediction. ExxonMobil Upstream Research Company Research Application Report URC.2016.046, 136 p.

Note: Several additional manuscripts are in preparation for submission during Fall 2021, only published manuscripts are listed here.

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ABSTRACTS *graduate student, **undergraduate student

  1. Eyster, A., Brengman, L. A., Ramezani, J., George, S., Bergmann, K., (2021). The first high resolution CA-ID-TIMS constraints on post-GOE Iron formation deposition. Geological Society of America, Portland Oregon (upcoming).
  2. *Prue, A.M, Brengman, L.A., (2021). Preliminary custom iron formation calibration for a portable x-ray fluorescence instrument using the Neoarchean Soudan iron formation, Minnesota, USA. Geological Society of America, Portland Oregon (upcoming).
  3. *Prue, A.M, Brengman, L.A., (2021). Preliminary pXRF results from Precambrian rocks of northern Minnesota. Institute of Lake Superior Geology (ILSG).
  4. Eyster, A., Brengman, L.A., Bergmann, K., (2020). Investigating the coupling between plume volcanism and massive iron formation deposition after the rise of oxygen. (Virtual presentation Fall AGU meeting, December 8th, 2020).
  5. *Duncanson, S.D., Brengman, L.A., Fournelle, J., Moy, A. (2020). Reconstructing Fe-silicate paragenesis using paired textural and compositional data in the ~1.9 Ga Biwabik Iron Formation, MN. North-Central Geological Society of America, May 18-19, 2020 (virtual presentation, COVID-19, https://gsa.confex.com/gsa/2020NC/meetingapp.cgi/Paper/346106.
  6. Eyster, A., Brengman, L.A., Nichols, C., **Levitt, Z., Bergmann, K.D.  (2020), The tectonic context for the Gogebic Range iron formations. North-Central Geological Society of America, May 18-19, 2020 (virtual presentation, COVID-19).
  7. **Boor, E., **Carpenter, L., **Krauss, H., **Wojtowicz, E., Brengman, L.A., Goodge, J.W., Hansen, V.L. (2020), Origin of Neoarchean metasedimentary rocks near Pike Lake, Vermilion District, Northeast, Minnesota. North-Central Geological Society of America (presentation cancelled, COVID-19).
  8. Brengman, L.A., Stewart, E.K., **Stolze, D., **Faust, E., Wittkop, C. (2020), The role of silica in iron formations: textural, mineralogical, and geochemical comparisons from low metamorphic grade Neoarchean and Paleoproterozoic examples. North-Central Geological Society of America (presentation cancelled, COVID-19).
  9. Brengman, L.A., Stewart, E. (2019), Textural and mineralogical characteristics of the <1710 Ma Freedom Formation compared to well-characterized, low-metamorphic grade Archean and Paleoproterozoic iron formations. PP51E-1406, American Geophysical Union.
  10. Brengman, L.A., *Duncanson S.P., **Hanson, S., **Wetzel, A (2019). Crossing the redoxcline: an investigation into geochemical changes that directly link to textural transitions in the ~1.9 Ga Biwabik Iron Formation, MN. Geological Society of America Abstracts with Programs. Vol. 51, No. 5. doi: 10.1130/abs/2019AM-339533.
  11. *Duncanson, S.P., Brengman, L.A., Fournelle, J.H., Moy, A (2019). Deciphering primary and diagenetic controls on mineralogy in the ~1.9 Ga Biwabik Iron Formation, MN using paired textural and geochemical analyses. Geological Society of America Abstracts with Programs. Vol. 51, No. 5. doi: 10.1130/abs/2019AM-339482.
  12. Brengman, L. A., & Fedo, C (2018). Replacement minerals formed during alteration of volcanic rocks in the ~2.7 Ga Abitibi Greenstone Belt carry rare-earth element attributes of mixed hydrothermal fluids and seawater. American Geophysical Union Abstracts.
  13. Brengman, L.A., Stewart, E., Stewart, E., Moy, A., Fournelle, J., & **Segee-Wright, G. (2018) Reviving historical data >100 years later: a fresh look at the depositional setting and petrogenesis of the <1.71 Ga Freedom Formation, Baraboo, Wi. Geological Society of America Abstracts.
  14. Brengman, L.A., **Johnson, K., & Trower, L. (2018). Grain size distributions and mineralogy of coated grains, detrital sand and silt within the 1.9 ga Mesabi Iron Range, Minnesota. Geological Society of America Abstracts.
  15. Fedo, C., & Brengman, L.A. (2018) Geochemistry of multiple carbonate units from the ~3.7 ga isua greenstone belt, sw greenland. Geological Society of America Abstracts.
  16. *Drazan, J., Brengman, L.A, & Fedo, C (2018). Preliminary petrographic and geochemical investigation of silicified volcanic rocks and silica-rich exhalative rocks from the ~2.7 Ga Abitibi Greenstone Belt, Canada. Institute of Lake Superior Geology (ILSG).
  17. Stewart, E., Skalbeck, J., **Rasmussen, J., Gotkowitz, M., Brengman, L.A., **Segee-Wright, (2017) G. Developing a geologic framework for aquifer geometry through modeling of gravity and aeromagnetic data.  (American Water Resources Association, Wisconsin Section Annual Meeting, Appleton, WI)
  18. Brengman, L. A., Fedo, C.M., Whitehouse, M.J. (2016), American Geophysical Union, “Textural and isotopic evidence for silica cementation in ~1.88 Ga Granular Iron Formation,” San Francisco, California, United States.
  19. Brengman, L. A., Larson, P., **Hanson, S. (2016), Geological Society of America, “A textural and mineralogical investigation of early diagenetic reactions in the ~1.88 Ga Biwabik iron formation, MN,” Denver, Colorado, United States. Geological Society of America, Abstracts with Programs. v. 48, n. 7.
  20. Brengman, L.A., Fedo, C. M., Whitehouse, M. J. (2015) Micro-scale silicon isotope heterogeneity observed in hydrothermal quartz precipitates from the >3.7 Ga Isua Greenstone Belt, SW Greenland. Geological Society of America, Abstracts with Programs, Annual Meeting, Baltimore, MD, v. 47, n. 7, p.786.

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INVITED TALKS

  1. Brengman, L.A.,The role of authigenic silica in chert and iron formation containing assemblages” Invited research seminar, Queens University, Kingston, ON (May 27th, 2021).
  2. Brengman, L.A.,How ancient iron-rich rocks tell the story of past oceans” Minnesota Mineral Club. Public virtual lecture (March 13, 2021). YouTube link: https://www.youtube.com/watch?v=fJK87-quZYY&t=501s
  3. Brengman, L.A., “How ancient iron-rich rocks tell the story of Minnesota’s oceans”. Geological Society of Minnesota.Public virtual lecture (September 21, 2020). YouTube link:   https://www.youtube.com/watch?v=0y3NHiN9zfE.
  4. Brengman, L. A., “Evaluating textural and geochemical evidence in Precambrian sedimentary rocks: implications for preservation potential and depositional setting,” Soft Rock seminar, University of Minnesota, Minneapolis, Minnesota (October 28, 2019).
  5. Stewart, E., Brengman, L.A. (Co-authors & Co-presenters), “Reading the deep time sedimentary record – Using historic mine records and outcrop to understand the history of ancient rivers, oceans, and faulting in Wisconsin,” Department Seminar, University of Minnesota Duluth, Duluth, Minnesota (February 7, 2019).
  6. Brengman, L. A., Sedimentary geology, hydrogeology, and geomorphology seminar, University of Minnesota Duluth, Duluth, Minnesota (December 5, 2017).
  7. Brengman, L. A., “How can iron formations inform us about the ancient ocean,” Swenson College of Science and Engineering Faculty Colloquium, University of Minnesota Duluth, Duluth, Minnesota (November 27, 2017).
  8. Brengman, L. A., Decoding the Precambrian silica cycle using silicon isotopes of quartz in chert and iron formation,” Department Seminar, University of Iowa, Iowa City, Iowa (February 24, 2017).
  9. Brengman, L.A., Textural and isotopic evidence for early silica cementation in ~1.9 Ga Granular Iron Formation” Seminar, Mesabi Range Geological Society, Duluth, Minnesota (January 18, 2017).
  10. Brengman, L. A., “Seafloor silicification as a genetic mechanism for some iron formation influenced by hydrothermal fluids,” Soft Rock seminar, University of Minnesota, Minneapolis, Minnesota (October 21, 2016).
  11. Brengman, L. A., “Decoding the Precambrian silica cycle using silicon isotopes of quartz from chert and iron formation,” Department Seminar, University of Minnesota, Minneapolis, Minnesota (October 20, 2016).
  12. Brengman, L.A., “The growth of continents, the rise of oxygen, and the birth of the biosphere – what one extinct rock can tell us about early Earth.” Seminar, Gustavus Adolphus College, St. Peter, Minnesota (December 3, 2015).
  13. Brengman, L.A., “Do silicon isotopes of quartz in chert and iron formation reveal information about critical events in early Earth history?” Large Lakes Observatory seminar, University of Minnesota Duluth, Duluth, Minnesota (October 2, 2015).

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MEDIA APPEARANCES

University of Minnesota Duluth, Swenson College of Science and Engineering, Resolving the rock paradox (online news article), April 11, 2018.

Lab group members (including two undergraduate researchers A. Wetzel and K. Johnson) were interviewed for our work on chemical sedimentary rocks from the Iron Range, which seeks to answer longstanding questions about the temperature and elemental compositions of earth’s early oceans.

Link: https://scse.d.umn.edu/earth-environmental-sciences-department/news/rock-paradox

Earth Magazine, American Geosciences Institute (AGI), “Going subterranean: repurposed mines become innovative labs”, February 2018.

For our Geobiology class, GEOL 5095 (Spring 2018), J. Knackert (journalist and science communicator) and K. Cantner (AGI science illustrator) came with our class to the Soudan Underground mine. While there, we collected samples from the unique pools and rocks associated with lower mine levels for microbiological and geochemical characterization by the undergraduate / graduate students in the Geobiology course. That trip forms a large part of the cover article for the November 2018 Earth Magazine issue “Old Mines, New Labs”.

Link: https://www.earthmagazine.org/article/going-subterranean-repurposed-mines-become-innovative-labs

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SCIENTIFIC SESSIONS ORGANIZED

Geological Society of America Annual Meeting, 2019, Phoenix, Arizona. Session organizer and chair with Dr. Athena Eyster (MIT) and Dr. Geoff Gilleaudeau (George Mason University). Iron Formations, Ferruginous Sediments, and Redox through Time and Space. Geological Society of America Abstracts with Programs. Vol. 51, No. 5

Talks: https://gsa.confex.com/gsa/2019AM/webprogram/Session47906.html

Geological Society of America Annual Meeting, 2018, Indianapolis, Indiana. Session organizer and chair with Dr. Geoff Gilleaudeau (George Mason University). Evolving perspectives of the Precambrian world: using combined theoretical and applied approaches to tackle problems at the intersection of geology, geobiology, and geochemistry.

Poster presentations:  https://gsa.confex.com/gsa/2018AM/webprogram/Session46475.html

Talks: https://gsa.confex.com/gsa/2018AM/meetingapp.cgi/Session/45551

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CONTRIBUTIONS TO PROFESSIONAL ORGANIZATIONS

Proposal Reviewer (2016 – present)

  • Society for Advancing Chicanos/Hispanics & Native Americans in Science (SACNAS), Reviewed proposals for travel grants
  • Society for Advancing Chicanos/Hispanics & Native Americans in Science (SACNAS), Reviewed proposals for Research Presentations
  • Mathematics of Information Technology and Complex Systems (MITACS), national, not-for-profit organization that has designed and delivered research and training programs in Canada, Reviewed research and project proposals
  • American Chemical Society, Petroleum Research Fund, Reviewed research proposals

Proposal Review Panelist (2016, 2018)

  • National Aeronautics and Space Administration (NASA)

Journal Manuscript Reviewer (2015 – present)

  • Precambrian Research
  • Sedimentology
  • Terra Nova
  • Minerals
  • Chemical Geology
  • Geology
  • Communications Earth and Environment
  • Earth and Planetary Science Letters

Professional Affiliations

  • American Geophysical Union
  • Geological Society of America

External thesis reviewer

  • Paul Bielski (M.Sc. candidate, Lakehead University, Advisor: Dr. Phil Fralick)
  • Gabriel Sindol (M.Sc. candidate, Memorial University, Advisor: Dr. Michael Babechuck)

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GRADUATE AND UNDERGRADUATE MENTEES

Graduate students supervised

  • Ann Marie Prue, M.S. student (2020 – present, primary advisor). In progress, anticipated graduation 2022. Thesis project title: “Multi-method geochemical investigation of the Neoarchean Soudan iron formation, NE, Minnesota”.
  • Sam Duncanson, M.S. student (2018 – 2020, primary advisor). Graduated December 2020. Thesis title: “Identification of primary and diagenetic mineralogy preserved in silica-cemented horizons of the Biwabik Iron Formation, Minnesota, using petrography and electron microprobe analysis.” University Digital Conservancy link: https://hdl.handle.net/11299/218662.

Undergraduate students supervised (research projects and UROPs)

  • Elizabeth Boor, Geological Sciences, B.S., (2019 – 2020).
  • Heidi Krauss, Geological Sciences, B.S., (2019 – 2020).
  • Emily Wojtowicz, Geological Sciences, B.S., (2019 – 2021) Senior Honors Thesis project.
  • Logan Carpenter, Geological Sciences, B.S., (2019 – 2020).
  • Danielle Stolze, Geological Sciences, B.S. (2019 – present). Project: “Comparative mineralogy of the ~2.7 Ga Soudan Iron Formation, Minnesota and the Deloro Iron Formation, Timmins, ON, and the Temagami Iron Formation, Temagami, ON.” https://conservancy.umn.edu/handle/11299/213805
  • Kendall Johnson, Geological Sciences B.S. (2017 – 2018). Project: “Grain size distributions and mineralogy of coated grains, detrital sand and silt within the ∼1.9 Ga Mesabi Iron Range, Minnesota” https://conservancy.umn.edu/handle/11299/213998
  • Anthony Wetzel, Geological Sciences B.S. (2017 – 2018). Project: “Broadly constraining Proterozoic ocean pH by determining primary and secondary carbonate mineral reactions in iron formation from the ~1.9 Ga Mesabi Iron Range, MN”
  • Stephen Hanson, Geological Sciences, B.S. (2016 – 2017). Project: “A textural and mineralogical investigation of early diagenetic reactions in the ~1.9 Ga Biwabik iron formation, MN”

Undergraduate summer Research Assistants

  • Katie Linderholm, Environmental Sciences, B.S., (2021 – present).
  • Logan Carpenter, Geological Sciences, B.S., (2019 – 2020).
  • Danielle Stolze, Geological Sciences, B.S. (2019 – 2020).
  • Mady David, Geological Sciences B.S. (2018 – 2019).
  • Kendall Johnson, Geological Sciences B.S. (2017 – 2018).
  • Anthony Wetzel, Geological Sciences B.S. (2017 – 2018).
  • Stephen Hanson, Geological Sciences, B.S. (2016 – 2017).

Research employees

  • George Segee-Wright, Hamilton College (Summer and Fall 2017).
  • Kendall Johnson (Spring – Fall 2020).

Graduate student committees

  • Jacob Daire, Civil Engineering, M.S. (2018 – 2019).
  • Kristi Kotrapu, Geological Sciences, M.S. (2017 – 2018).
  • Amber Roberts, Geological Sciences, M.S. (2016 – 2018).
  • Matthew Matko, Geological Sciences. M.S. (2017 – 2018).
  • Margaret Upton, Geological Sciences, M.S. (2017 – 2018).

Undergraduate academic advisees (16 Geological Sciences and Environmental Sciences).

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COURSES TAUGHT while at the University of Minnesota Duluth, (August 2015 – present)

(I teach both the labs and the lecture sections for all courses)

  • Earth History GEOL 2110 (2016 – present) Undergraduate level; I teach all lectures and all laboratories (1 lecture section (3, 50-minute meetings per week), 4 lab sections (4 separate 2-hour lab sessions per week (8 hours total)); Spring 2020, Center for Educational Innovation “Thank a Teacher” certificate awardee.
  • Geochemistry GEOL 4710/5711 (2016 – present)Upper division undergraduate/graduate level, with lecture and lab; (In 2016 and 2017 the course was taught as “Introduction to Geochemical Concepts”)
  • Geobiology GEOL 5091/4091 (2018, designed, created, and co-taught with Dr. Cody Sheik) Upper division undergraduate/graduate level.
  • Geobiology GEOL 5091/4091 (2021 re-designed and co-taught with Dr. Wendy Smythe) Upper division undergraduate/graduate level.
  • Sedimentology and Stratigraphy GEOL 3420 (Fall 2020, Co-taught with Dr. John Swenson; Fall 2021, Brengman sole instructor) Upper division core course with lab. Fall 2020, Center for Educational Innovation “Thank a Teacher” certificate awardee.
  • Geologic Problems GEOL 4091/5091: (2020) Interpreting Precambrian Depositional systems, seminar-style course
  • Geologic Problems GEOL 5091: (2018 and 2020) Chemical sedimentation in the Precambrian, seminar-style course
  • Geologic Problems GEOL 5091: (2017) Silicification in Archean volcano-sedimentary assemblages, seminar-style course

PUBLIC OUTREACH

  • Chancellor’s small grant, “Involving UMD students from across campus to update the museum-quality display cases in Heller Hall and connect to a modern audience.” Awarded, (May 8, 2020). $2,999.40. Brengman, L. A. (PI). Project Goal: The goal of this project is to involve UMD students from Earth and Environmental Science, Art and Design, and Museum Studies in the re-design and renovation of the outdated museum-quality display cases on the first floor of Heller Hall. Purpose: By updating the Heller Hall museum cases, we propose to bring the displays into the digital age and increase accessibly of the information for diverse audiences within our community. The students will directly improve their science communication skills in addition to increased exposure to connecting art, design, and science. Community Impact: With the renovation of the museum-quality display cases on the first floor of Heller Hall, we have the unique opportunity to increase public engagement with UMD by providing a free, accessible educational resource for students, and the public.
  • Participant, Letters to a Pre-Scientist, Science Communication, (2019 – 2020).
  • Community Ambassador for EarthArXiv (https://eartharxiv.org/; 2017 – present).
  • Volunteer, Math Prep for STEM Careers summer course field trip outreach events. (2018, 2019). I participated in and formulated activities for the STEM incoming freshman camp.
  • Coordinator, Middle school class visit and field trips. (2018, 2019). I helped facilitate, organize, and coordinate group field trips from led by graduate students.
  • Volunteer at STARBASE, Hermantown, MN. (October 5, 2018). “STARBASE is a non-profit … educational program that provides free, hands-on, immersive curriculum in STEM (Science, Technology, Engineering, and Math) to local 5th graders.”
  • Coordinator, organizer, member, and facilitator, Community Outreach for Department of Earth and Environmental Sciences (November 2016 – 2018). I helped to develop outreach kits and activities for the UMD K-12 local outreach program to five Duluth area schools. The program initiated by Charity Rupp reached >500 students for 26 days out of the year (2-3 times a day, for a total of 156 student/ faculty volunteer slots for 52-78 events). With the help of the outreach office and graduate student Maggie Upton, we created 3 deployable outreach kits for 4th and 5th grade students. Each kit contains: (1) a formal lesson plan, complete with instructions and worksheets for both students and student volunteers / primary instructors, and (2) all materials necessary for the 45-minute, or 90-minute activities. At present, all activities align with Minnesota State Standards for “Rocks and Minerals I and II”, and “Landforms”, and we have built in the possibility for yearly extension or expansion packs to highlight novel regional and global research from our department.
  • Department tour guide for Donors (periodic since 2015).
  • Presenter, Graduate student breakfast “speed research” talk (October 21, 2015). The growth of the continents, the rise of oxygen, and the birth of the biosphere – what one extinct rock can tell us about early Earth.”
  • Science Day coordinator, University of Minnesota Duluth, MN; Helped to organize Science and Engineering Day activities for local K-12 students. (2015 – 2017).

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PROFESSIONAL SERVICE to the University of Minnesota Duluth

  • Member, Outreach committee (term begins August 2021).
  • Member, Advanced Materials Center Steering Committee (January 2021 – present).
  • Member, Overman Lecture organizing committee (Spring 2021).
  • Member, Tech hire search committee (Spring 2021).
  • Member, Term hire search committee, (Spring 2021).
  • Member, Ad hoc merit subcommittee, (Spring, 2021).
  • Member, SCSE ad hoc awards committee (Spring 2021).
  • Faculty Advisor, Earth Science Club. (August 2019 – present).
  • Coordinator, Department seminar series coordinator (Fall 2020, Spring 2016).
  • Rock room training coordinator, (2019 – present).
  • Department social media coordinator, (2019, Spring 2021 – present).
  • Member, Staff hire search committee (Fall 2019).
  • Member, Lakehead University International opportunity exploration committee. (November 15, 2018 – November 16, 2018). I was a part of a 2-day international envoy to Lakehead University in Thunder Bay, Ontario. The goal was to explore institutional collaborative potential between UMD and Lakehead University.
  • Member, Search committee for new Faculty hire in Chemical Engineering. (Spring 2018).
  • Member, Science and Engineering Day Committee, Swenson College of Science & Engineering (2016 – 2018).
  • Member, SciArt Committee in Earth & Environmental Sciences. (August 2018 – Present). The SciArt (Science and Art) Committee is tasked with renovating the display cases, installing geologic, educational floor maps, and updating outward facing educational content displayed within Heller Hall.
  • Member, Curriculum Committee for Department of Earth and Environmental Sciences. (September 2016 – Present). The Curriculum Committee worked to revise both degree programs in the department (1: Geology, 2: Environmental Sciences) to allow all students in the program to begin a core sequence together, facilitating interdisciplinary learning and fostering community within the program.
  • Member, Lake Superior Youth Symposium planning committee. (June 2018 – October 2018).
  • Reviewer, Undergraduate Research Opportunities Program (UROP) at UMD (2015, 2017).

PROFESSIONAL SERVICE to the community

  • Outstanding Student Presentation Award (OSPA) Poster Judge, American Geophysical Union. (December 2019).
  • Women in Geology Career Pathways Program Mentor, Geological Society of America (GSA). (September 21 – 25, 2019).
  • Resume Mentor, Geological Society of America (GSA). (September 21- 25, 2019).
  • Outstanding Student Presentation Award (OSPA) Poster Judge, American Geophysical Union. (December 10, 2018 – December 14, 2018).
  • Women in Geology Career Pathways Program Mentor, Geological Society of America (GSA). (November 4 – 6, 2018).
  • Resume Mentor, Geological Society of America (GSA). (Nov.4 – 6, 2018).
  • Student poster judge, Institute of Lake Superior Geology. (May 2018).

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PROFESSIONAL DEVELOPMENT & PEDAGOGICAL TRAININGS

  • Member, URGE (Unlearning Racism in the Geosciences) pod, UMD, (Spring 2021).
  • Workshop, “Cultivating Leadership for Change and Justice: Progress and lessons learned after one year of anti-racism efforts in the geosciences,” (Virtual, Spring 2021).
  • Discussion, “A conversation with Alice Wong, Office of Equity, Diversity, and Intercultural programs, UMN Morris, (Virtual, Spring 2021).
  • Workshop, “A Call to Action, Geological Society of America”, (Virtual, Fal, 2020).
  • Training, AT 118 “Beyond Content: Fostering Online Interaction”, UMTC, (Virtual, 2020).
  • Training, CEI 318 “Motivating students with feedback”, UMTC, (Virtual, 2020).
  • Discussion, CEI “Fall Science Field Experiences”. (Virtual, 2020).
  • Discussion, CEI “Flexible Assignments and Assessments”, UMTC, (Virtual, 2020).
  • Training, “Becoming an Active Bystander”, Northwestern University, (Virtual, 2020).
  • Webinar, “The Mountains are calling and we can all go: Accessibility and Inclusivity in geosciences”, Society for Advancement of Chicanos/Hispanics and Native Americans in Science (SACNAS), (Virtual. 2020).
  • Trainings, Bruker pXRF Tracer 5g, (2020). Trainings included a 2-day virtual training, and two, half day trainings on instrument safety, operation, and radiation safety. It also involved taking 2 UMD Radiation safety courses, and an instrument audit from the UMTC campus.
  • EARTHRATES, All hands, 5-part virtual meeting, (December 2020 – January 2021).
  • AGU Workshop, “Fostering Diverse Inclusive and Equitable Communities in Geoscience Field Experiences” (December 10, 2019)
  • AGU Workshop, “Establishing and Sustaining an Undergraduate Research Program” (December 9, 2019)
  • SERC workshop, “Inclusive and Effective College Science Classrooms: Engaging Students, Designing Lessons, and Integrating Diversity into Curriculum” (December 8, 2019)
  • SCSE Teaching and reading cohort (weekly meetings, Spring 2019)
  • Webinar: UCS, Beyond the trend of Decolonizing Science (April 15, 2019)
  • Workshop, UMD SCSE Getting External Grants: A workshop for early career faculty researchers (October 2018)
  • Workshop, Arizona State University, Secondary Ion Mass Spectrometry (Jan 4-6, 2017)
  • Early Career Workshop, SERC, College Park, Maryland (July 24-29, 2016)
  • SCSE UMD Teaching workshop, Active learning (January 6-8, 2016)
  • UMD Active Learning Workshop (October 2015)

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