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Supplemental Material: Rapid retreat of the southwestern Laurentide Ice Sheet during the Bølling-Allerød interval

Norris, Sophie L., al., et·2021
DOI 10.1130/geol.s.17118749

Preprint — published as 10.1130/g49493.1

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Abstract

Description of laboratory techniques, age calculation, complication of preexisting chronology, and model setup.

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Crossref · 10.1130/geol.s.17118749

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Figures

Figure S1 Photographs of boulders sampled for 10Be surface exposure ages.
Figure S1 Photographs of boulders sampled for 10Be surface exposure ages.CC-BY-NC · From the PDF
Image 2
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Figure S2 Probability density functions (i.e. 'normal kernel density estimate') for all 10 Be surface exposure samples sites. Blue lines represent reported age and 1 SD uncertainty, black lines are summed probabilities. Vertical black line represents the mean and grey boxes 1 SD excluding outliers of each sample site. Average ages, in bold, with propagated uncertainly calculated using the default calibration set of Borchers et al. (2016) and the time dependent 'LSDn' production scaling scheme of Lifton et al. (2014), with no correction for snow shielding and a zero erosion rate.
Figure S2 Probability density functions (i.e. 'normal kernel density estimate') for all 10 Be surface exposure samples sites. Blue lines represent reported age and 1 SD uncertainty, black lines are summed probabilities. Vertical black line represents the mean and grey boxes 1 SD excluding outliers of each sample site. Average ages, in bold, with propagated uncertainly calculated using the default calibration set of Borchers et al. (2016) and the time dependent 'LSDn' production scaling scheme of Lifton et al. (2014), with no correction for snow shielding and a zero erosion rate.CC-BY-NC · From the PDF
Image 4
CC-BY-NC · From the PDF

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Citations

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Research works printed but not linked: 23

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  2. Benedict, J.B. 1993: Influence of snow upon rates of granodiorite weathering, Colorado Front Range, USA. Boreas, 22(2), 87-92. https://doi.org/10.1111/j.1502-3885.1993.tb00167.x · DOI
  3. Borchers, B., Marrero, S., Balco, G., Caffee, M., Goehring, B., Lifton, N., Nishiizumi, K., Phillips, F., Schaefer, J. and Stone, J. 2016: Geological calibration of sp ation production rates in the CRONUS-Earth project. Quaternary Geochronology 31, 188-198. https://doi.org/10.1016/j.quageo.2015.01.009 · DOI · Paper page
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  6. Jones, R.S., Whitehouse, P.L., Bentley, M.J., Small, D. and Dalton, A.S. 2019: Impact of glacial isostatic adjustment on cosmogenic surface-exposure dating. Quaternary Science Reviews, 212, 206-212. https://doi.org/10.1016/j.quascirev.2019.03.012 · DOI
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  10. Lifton, N., Sato, T., and Dunai, T. J. 2014: Scaling in situ cosmogenic nuclide production rates using analytical approximations to atmospheric cosmic-ray fluxes. Earth and Planetary Science Letters, 386, 149-160. https://doi.org/10.1016/j.epsl.2013.10.052 · DOI
  11. Margold, M., Gosse, J. C., Hidy, A. J., Woywitka, R. J., Young, J. M. and Froese, D. 2019: Beryllium-10 dating of the Foothills Erratics Train in Alberta, Canada, indicates detachment of the Laurentide Ice Sheet from the Rocky Mountains at ~15 ka. Quaternary Research, 92(2), 469-482. https://doi.org/10.1017/qua.2019. · DOI
  12. Munyikwa, K., Feathers, J. K., Rittenour, T. M., and Shrimpton, H. K. 2011: Constraining the Late Wisconsinan retreat of the Laurentide ice sheet from western Canada using luminescence ages from postglacial aeolian dunes. Quaternary Geochronology, 6(3-4), 407-422. https://doi.org/10.1016/j.quageo.2011.03.010 · DOI
  13. Munyikwa, K., Rittenour, T. M., and Feathers, J. K. 2017: Temporal constraints for the Late Wisconsinan deglaciation of western Canada using eolian dune luminescence chronologies from Alberta. Palaeogeography, palaeoclimatology, palaeoecology, 470, 147-165. https://doi.org/10.1016/j.palaeo.2016.12.034 · DOI · Paper page
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Metadata

Authors
Norris, S. L., & al., E.
ORCID
Norris, Sophie L.
Publisher
Geological Society of America
Published
2021-12-02
DOI
10.1130/geol.s.17118749
Cited by
0
Licence
creativecommons.org/licenses/by-nc/4.0/ (unspecified)

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CoChat. (2026). Citation check: Supplemental Material: Rapid retreat of the southwestern Laurentide Ice Sheet during the Bølling-Allerød interval. https://app.cochat.ai/papers/10.1130/geol.s.17118749
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Norris, S. L., & al., E. (2021). Supplemental Material: Rapid retreat of the southwestern Laurentide Ice Sheet during the Bølling-Allerød interval. https://doi.org/10.1130/geol.s.17118749