Glacial Geology and Geochronology Research Group

Welcome to the Glacial Geology and Geochronology Research Group at the University of Maine!  Use the links below to learn more about our ongoing research.

Research

We are working on projects in western Maine/northern New Hampshire, Scotland, Greenland, Mongolia, New Zealand, South America, and Antarctica.

view research
Data

Photo Gallery

Follow the links to view photos from our research projects around the world!

Antarctica
Greenland
south america

Learn about the researchers and students in our group!

People

NEWS

 Check out these new papers from our research group!

Bromley, G. Hall, B., Putnam, A., and Lowell, T., 2026. Testing current estimates of the in situ cosmogenic 10Be production rate in the north-western British Isles, with implications for ice sheet behaviour during Termination 1. Geochronology, .


Spoth-Ascencao, M., Diefendorf, A., Hall, B., Putnam, A., Gill, J., Corcoran, M., Boyle, D., Bassett, S., and Mensing, S., 2026. Tracking shifts in the westerlies at Baboon Lakes, central Sierra Nevada, California over the last 12,000 years. Quaternary Science Reviews, 10.1016/j.quascirev.2026.110294.

Bromley, G., Bunce, C., Hall, B., Putnam, A., and McDermott, F., 2026. Deglaciation of the Burren glacio-karst, western Ireland, during Termination 1: Implications for North Atlantic climate and karstification. Journal of Quaternary Science, doi:10.1002/jqs.70068.

Spoth-Ascencao, M., Hall, B., Gill, J., Diefendorf, A., Lowell, T., Russell, J., Corcoran, M., and Brickle, P., 2026. A 13,000-year record of the Southern Hemisphere Westerlies inferred from pollen and plant wax isotopes from the South Atlantic. Paleoceanography and Paleoclimatology doi:10.1029/2025PA005353.

Archived News

  • Hall, B., Putnam, A., Lowell, T., Denton, G., Russell, J., Soteres, R., Spoth-Ascencao, M., Miles, M., Thomas, S., Moreno, P., Schwartz, R., and Schaefer, J., 2026. Rapid thinning of the Cordillera Darwin icefield at the onset of Termination I.혻Quaternary Science Reviews桂109754.
  • Former PhD student Dr. Maraina Miles (May 2025) has accepted a visiting faculty position at Berea College, Kentucky. Congratulations, Maraina!
  • Dr. Meghan Spoth (PhD May 2025) is starting a multi-year postdoc at Syracuse University with Dr. Tripti Bhattacharya. Best of luck with your new position!
  • Sera Thomas successfully defended her MS thesis and graduated in May. Her work provides new details on the Antarctic Cold Reversal in southern South America. Congratulations!
  • We recently published a paper on the deglaciation of eastern North America during Heinrich Stadial 1. Check it out!
    Hall, B.L., Lowell, T.V., Bromley, G.R.M., Putnam, A.E., and Allen, K., 2025. Rapid deglaciation of eastern Maine, northeastern North America, during Heinrich Stadial 1. Quaternary Science Reviews 363, 109444.
  • TV interviews and articles about Maraina Miles’ photo exhibit from a research expedition to Tierra del Fuego: The 207 tv interview:
  • New paper out: “History of the Antarctic Ice Sheet in the McMurdo Sound region at and since the Last Glacial Maximum: Evidence from Miers Valley”
  • Congratulations to Meghan Spoth for receiving the 2024 Limnogeology Division Kerry Kelts Award from the GSA Limnogeology Division!
  • New paper out “Tracking the southern hemisphere westerlies during and since the last glacial maximum with multiproxy lake record s from the Falkland Island s (52 째S )” in Quaternary Science Reviews:
  • Congratulations to Scott Braddock for a successful PhD defense!
  • New paper out on the interactions between local glaciers and the adjacent grounded Ross Sea ice in the Royal Society Range, Antarctica:
  • April, 2024: Dr. Aaron Putnam, graduate students Tricia Hall, Katie Westbrook, and Zander Roman returned from months of fieldwork in the Southern Alps of New Zealand where they collected samples from boulders for cosmogenic surface exposure age dating.
  • April, 2024: Dr. Brenda Hall, graduate students Sera Thomas, Meghan Spoth and Maraina Miles just returned from a second season in Tierra del Fuego, Chile, along with colleagues from the University of Cincinnati and the Universidad de Magallanes and a science journalism student from Northwestern University. They collected sediment cores from bogs and samples from boulders for cosmogenic exposure age dating.
  • Congratulations to Peter Strand for a successful PhD defense!
  • Congratulations to PhD student Scott Braddock who received outstanding graduate student award and PhD student Peter Strand who received the outstanding graduate research award in the College of Natural Sciences, Forestry, and Agriculture.
  • Brenda Hall, graduate students Meghan Spoth and Maraina Miles and undergraduate Eva Griffiths spent a month on a sailboat in the Beagle Channel, southern Chile, along with colleagues from the University of Cincinnati and the Universidad de Magallanes and a science journalism student from Northwestern University. They were collecting data to help answer questions about the cause of the last ice-age termination. Stay tuned for a larger report on the field season soon!
  • Former student Tess Walther, along with Brenda Hall, George Denton, and Chris Hendy (University of Waikato, NZ) just had a paper accepted in Quaternary Science Advances concerning Antarctic glacial history. This paper stems from Tess’s MS degree. Congratulations Tess!
  • Current student PhD Meghan Spoth, along with Brenda Hall and colleagues at the University of Cincinnati and the South Atlantic Environmental Research Institute just had a paper accepted in Quaternary Science Reviews concerning shifts in the southern hemisphere westerlies since the last ice age. Nice job Meghan!
  • New paper out, led by collaborators at NUI Galway, including graduate student Adrienne Foreman and UM alum Gordon Bromley.

University of Maine Cosmogenic Isotope Laboratory

For K-12 teachers

Members of our research group regularly answer questions from K-12
students, and as technology permits, correspond with students from the
field. Interested teachers should contact Dr. Brenda Hall
(BrendaH@maine.edu) for more information.