The glaciation of North America through the Quaternary Faculty of Science, Charles University

Project summary

Large parts of northern North America were repeatedly covered by glaciers and ice sheets during the glacial periods of the Pleistocene. While relatively robust information is available on the Last Glacial Maximum (LGM) extents and timing, and on the timing and dynamics of deglaciation from the LGM, there is dearth of information on older glaciations in the early phases of the last glacial cycle and in the glacial cycles of the Middle and Early Pleistocene (Batchelor et al., 2019, Nat. Comms.). This information is critical for better understanding of long-term global climate system and how its extraterrestrial forcing is amplified by complex feedback mechanisms.

This project will attempt to establish the timing of older ice sheet glaciations in northern North America by employing novel methods of quantitative geochronology on some of the sites with identified pre-LGM glacial sediments. We will use the recently developed P-PINI method (Knudsen et al., 2020, EPSL, N

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