Rebecca L. Totten

Assistant Professor


  • PhD, Earth Science, Rice University, 2015
  • Shell Exploration and Production Co, 2015–2016
  • BS, Geology and Geophysics, University of Kansas, 2009
  • Geology and Geophysics, University of New Orleans, 2004–2005

Research Areas

  • Marine Geology and Geophysics
  • Paleontology, Paleoclimatology, and Paleoecology
  • Energy



Research Interests

My research is driven by the impacts of recent climate change; I strive to better understand historic observations within a geologic context. My primary field area is in marine basins of Antarctica, where I reconstruct the behavior of tidewater glaciers, ice shelves, and ice streams from sediment cores, microfossils, isotopes, and geophysical data. Analyzing regional differences in glacial behavior will help elucidate controls on their stability, including internal glacial dynamics, drainage basin size, orography, oceanography, and climate. Understanding these controls can help us better predict glacial responses to ongoing climate and oceanographic changes.

I am also interested in flooding history and storm impacts in the Gulf of Mexico region, and specifically how climate and land-use changes affect coastal environments. Sedimentology, algal bloom records, and geochemical signatures of sediment cores collected from bays that drain major metropolitan areas are used to identify and compare post-industrial vs. natural Holocene flooding history.

photo of research vessel coring in Antarctica
The Research Vessel/Icebreaker Nathaniel B. Palmer taking a sediment core in Antarctica. Credit- Linda Welzenbach

Current Research Projects

NSF THOR Project: We are funded by NSF and NERC to study the past and present stability of Thwaites Glacier, Antarctica, which is rapidly receding and has significant potential to contribute to sea-level rise. Our Thwaites Offshore Research team (THOR) of the International Thwaites Glacier Collaboration has collected sediment and geophysical records through two research expeditions and is currently analyzing these data to elucidate drivers of recent changes in the Thwaites Glacier system, as well as changes over the last 10,000 years. University of Alabama’s role in this research involves ocean productivity and temperature reconstructions. We analyze microscopic fossils of diatom and foraminifera plankton populations, as well as stable isotopes, to reconstruct ice-shelf history, sea-ice concentration, and the influence of warm deepwater through time.

Students on this project: Asmara Lehrmann (2nd year PhD, NSF Graduate Research Fellow and Graduate Council Fellow); Emma Tegert (junior in Geol. Sci., Outstanding Rising Junior in Geological Sciences); Robert Michael Comas (graduated with BS 2020, now a MS student at University of Houston on the project); Victoria Fitzgerald (completed, NSF Graduate Research Fellow). Student who has worked on similar project on oceanographic influence on Antarctic Peninsula glaciers: Adlai N.R. Fonseca (graduated, MS 2019).

Example of a dropstone in a silty deposit offshore Antarctica. Oceanographic influence on glacier stability can be interpreted from microfossils preserved in the sediment layers, including offshore diatoms (like the ~20 micron Fragilariopsis kerguelensis shown in the middle), while temperature of the water can be interpreted from warm-affinity diatoms, like the circular Thalassiosira antarctica- warm variety shown here, as well as benthic foraminifera like Bulumina aculeata, shown here with pink staining the living tissues. Credit- Antarctic Research Facility (formerly FSU), A.N.R. Fonseca, and R.L. Totten.

BOEM Microfossils Project: We are also funded by the Bureau of Ocean Energy Management – Marine Minerals Program to reconstruct paleo-environments and Pleistocene-Holocene coastal evolution offshore Mississippi through microfossil assemblage analysis, in support of the University of Southern Mississippi Cooperative Agreement (PI Davin Wallace) to map and quantify offshore sediment resources. We are currently analyzing ~40 cores with USM across the paleo-valley system offshore Petit Bois and Horn Islands, with planned seismic acquisition this summer.

UA Research Scientist on the project: Dr. Emily Elliott.

Paleo-reconstructions to improve coastal resiliency of Alabama and Mississippi: Ongoing work in the Mobile Bay-Mississippi Sound system is targeted at reconstructing paleo-storm and flood frequencies throughout the Holocene. With limited instrumental records and large paleoclimate data gaps in the Southeastern US, we aim to improve our knowledge of climate and storm relationships through long records, as well as quantify the impact of storms and coupled human impacts on ecology of estuaries. In collaboration with Drs. Davin Wallace (USM), Emily Elliott (UA), Fred Andrus (UA), Joe Lambert (UA), and other CoRPS faculty.

Several exceptional UA students have helped drive this research, collecting cores, analyzing grain size, stable isotopes, elemental geochemistry, foraminifera and diatom populations: Asmara Lehrmann (2nd year PhD, NSF Graduate Research Fellow and Graduate Council Fellow); Emma Tegert (junior in Geol. Sci., Outstanding Rising Junior in Geological Sciences); Lauren Parker (graduated, MS 2019, National Alumni Association Fellow, now working for environmental company in Maryland); and Joel Sobrado (B.S.G. 2020, U.S. Army ret., now working for environmental geology company in Arizona).


USGS EdMap Project: We have also been funded by the U.S. Geological Survey to map the Coatopa Quadrangle of the Gulf Coastal Plain, in a location with world-famous outcrops of the Cretaceous-Paleogene boundary. We work closely with the Geological Survey of Alabama Groundwater Division to map, measure stratigraphic sections, provide biostratigraphic zonations, and measure permeability that will help in building a groundwater model for the Tombigbee River system.

Student on this project: Tyler Wood (2nd year MS student, AAPG Chapter Vice President).


Fossil mosasaur jaw with teeth and oxygen isotope graphs of each tooth
Clidastes propython jaw with complete teeth that were sampled incrementally for oxygen isotopes. Graphs of each tooth record to the left can be correlated and used to build a multi-month life history of the swimming reptile. (Travis Taylor, Totten Minzoni, et al., 2021, Palaeo-3). Credit- Leah Travis Taylor

Fossil Marine Reptile Paleo-ecology: We analyze oxygen isotopes from fossil teeth to reconstruct the water environments  that ancient marine mosasaurs inhabited. Continuous records of daily growth lines allow us to reconstruct their migration history and paleo-biology. In collaboration with Drs. Celina Suarez (UArk), Luis Gonzalez (KU), Dana Ehret (NJ State Museum), Lynn Harrell (Geological Survey of Alabama), and the Alabama Museum of Natural History.

Student on this project: Leah Travis Taylor (graduated, MS 2019, McNair Fellow, Graduate Council Fellow, now pursuing a PhD in paleoclimatology at UMass-Amherst).

I am always searching for motivated students of sedimentology, micropaleontology, and stable isotope geochemistry to investigate some of our most pressing questions about the environmental and ecological impacts of past and present climate change. Contact me if this is you!

To learn more about what this research looks like, please visit our UA Sedimentary Geology and Micropaleontology laboratory website (

Research  Affiliations

Selected Publications

Refereed publications

*student of R. L. Totten (Minzoni), 5-yr Impact Factor (IF) listed

Sproson, A.D., Yokoyama, Y., Miyairi, Y., Aze, T., Totten, R.L., in review, Holocene melting of the West Antarctic Ice Sheet driven by tropical Pacific warming, Nature Communications. (IF 14.92, Q1)

Totten, R.L., Fonseca, A.N.R.*, Wellner, J.S., Munoz, Y.P., Anderson, J.B., Tobin, T., in review, Oceanographic and Climatic Influences on Trooz Glacier, Antarctica during the Holocene, Quaternary Science Reviews. (IF 4.878, Q1)

Atkins, C., Minzoni, Prather, B.E., Kopaska-Merkel, D.C., Morsilli, M., Lehrmann, D.J., Gill, K., Tew, B.N., Minzoni, R.T., and Enos, P., in review, Oceanographic and climatic impact on carbonate sediment production in a semi-restricted basin: Upper Jurassic Smackover Formation, Alabama, Palaeogeography, Palaeoclimatology, Palaeoecology. (IF 3.021, Q1)

Taylor, L.T.*, Minzoni, R.T., Suarez, C.A., Gonzalez, L.A., Martin, L.D., Lambert, W.J., Ehret, D.J., Harrell, T.L., 2021. Oxygen isotopes from the teeth of Cretaceous marine lizards reveal their migration and consumption of freshwater in the Western Interior Seaway, North America, Palaeogeography, Palaeoclimatology, Palaeoecology, v. 573, 110406. (IF 3.021, Q1)

Minzoni, R.T., Parker, L.*, Wallace, D.J., Lambert, W.J., Elliott, E.A., Andrus, C.F.T., Lehrmann, A.A.*, 2020. A 7,000-year record of floods and ecological feedbacks in Weeks Bay, Alabama, USA, Science of the Total Environment, v. 743. (IF 6.419, Q1)

Hogan, K.A., Larter, R.D., Graham, A.G.C., Arthern, R., Kirkham, J.D., Minzoni, R.T., Jordan, T.A.; Clark, R., Fitzgerald, V.*, Anderson, J.B., Hillenbrand, C.-D., Nitsche, F.O., Simkins, L., Smith, J.A., Gohl, K., Arndt, J.E., Hong, J., Wellner, J.S., 2020. Revealing the former bed of Thwaites Glacier using sea-floor bathymetry, The Cryosphere, v. 14, 2883-2908. (IF 4.927, Q1)

Bregy, J.C., Wallace, D.J, Minzoni, R.T., Cruz, V.J., 2018. 2500-year paleotempestological record of intense storms for the Northern Gulf of Mexico, United States, Marine Geology, v. 396, 26-42. (IF 3.764, Q1)

Minzoni, R.T., Majewski, W., Anderson, J.B., Jakobsson, M., 2017. Oceanographic controls on the stability of the Cosgrove Ice Shelf, The Holocene, 27(11): 1645-1658. (IF 2.628, Q1)

Świło, M., Majewski, W., Minzoni, R.T. and Anderson, J.B., 2016. Diatom assemblages from coastal settings of West Antarctica, Marine Micropaleontology, 125, p. 95-109. 2.091, Q1)

Fernandez, R.A., Anderson, J.B., Wellner, J.S., Minzoni, R.L., and Hallet, B., 2016.  Latitudinal variation in glacial erosion rates from Patagonia and the Antarctic Peninsula (46°-65°S), GSA Bulletin, v. 128 (5-6), p. 1000-1023. (IF 4.368, Q1)

Minzoni, R.T., Anderson, J.B., Fernandez-Vasquez, R.A., Wellner, J.S., 2015. Marine record of Holocene climate, ocean, and cryosphere interactions: Herbert Sound, James Ross Island, Antarctica, Quaternary Science Reviews, v. 129, p. 239-259. (IF 4.878, Q1)

Stroynowski, Z., Minzoni, R., and Majewska, R., 2013. 4th Polar Marine Diatom Taxonomy and Ecology Workshop, Cardiff University, UK, 4-9 August 2013, Diatom Research. 1.148, Q2)

Jakobsson, M., Anderson, J.B., Nitsche, F., Dowdeswell, J.A., Gyllencreutz, R., Kirchner, N., Mohammad, R., O’Regan, M., Alley, R.B., Anandakrishnan, S., Eriksson, B., Kirshner, A., Fernandez, R., Stolldorf, T., Minzoni, R., Majewski, W., 2010. Geological record of ice shelf break-up and grounding line retreat, Pine Island Bay, West Antarctica, Geology, vol. 39, no. 7, p.691-694. (IF 5.412, Q1)

Other publications

Larter, R.D., Queste, B.Y., Boehme, L., Braddock, S., Wåhlin, A.K.,  Graham, A.G.C., Hogan, K.A., Minzoni, R.T.,Barham, M., De’Oliveira, D.B., Fitzgerald, V.*, Clark, R., Karam, S., Kirkham, J.D., Mazur, A., Sheehan, P., Spoth, M., Stedt, P., Welzenbach, L., Zheng, Y., Andersson, J., Rolandsson, J., Beeler, C., Goodell, J., Rush, E., Snow, T., 2020, First research cruise of the International Thwaites Glacier Collaboration, Cruise NBP19-02, International Thwaites Glacier Collaboration,

Minzoni, R.L. Rice University Dissertation, 2015. The Antarctic Peninsula’s response to Holocene climate variability: Controls on glacial stability and implications for future change: 144p.

Stroynowski, Z., Minzoni, R., and Shukla, S.K., PAGES News, 4th Polar Marine Diatom Taxonomy and Ecology Workshop, Cardiff University, UK, 4-9 August 2013.

Minzoni, R.L., 2012. Depositional Insights into Eagle Ford Shale Gas System- An Integrated Geologic Analysis of the Mustang Ranch 1H Core, Zavala County, SW TX, USA, Shell Internal Summer Internship Report (Restricted), Shell International Exploration and Production: 56 p.

Anderson, J.B., Jakobsson, M., and Shipboard Scientific Party, 2010. Oden Southern Ocean 0910 OSO0910 Cruise Report,

Totten, R.L., 2009. Oxygen isotope evidence for Mosasaur migration and freshwater incursion. Senior Thesis, Departmental Honors, University of Kansas: 27p

two people on the water coring
UA and USM team taking a piston core in Mobile Bay, AL using a custom moon pool. Credit – Asmara Lehrmann