Articles | Volume 2, issue 2
Geochronology, 2, 245–255, 2020
Geochronology, 2, 245–255, 2020
Research article
11 Sep 2020
Research article | 11 Sep 2020

Delayed and rapid deglaciation of alpine valleys in the Sawatch Range, southern Rocky Mountains, USA

Joseph P. Tulenko et al.

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Cited articles

Armour, J., Fawcett, P. J., and Geissman, J. W.: 15 ky paleoclimatic and glacial record from northern New Mexico, Geology, 30, 723–726, 2002. 
Balco, G., Stone, J. O., Lifton, N. A., and Dunai, T. J.: A complete and easily accessible means of calculating surface exposure ages or erosion rates from 10Be and 26Al measurements, Quat. Geochronol., 3, 174–195, 2008. 
Balco, G., Briner, J., Finkel, R. C., Rayburn, J. A., Ridge, J. C., and Schaefer, J. M.: Regional beryllium-10 production rate calibration for late-glacial northeastern North America, Quat. Geochronol., 4, 93–107, 2009. 
Balco, G., Blard, P. H., Eaves, S., Heyman, J., Hidy, A., Jackson, M., Laabs, B., Lamp, J., Lesnek, A. J., Saha, S., Schimmelpfennig, I., Spector, P., and Tulenko, J. P.: ICE-D Alpine: informal cosmogenic-nuclide exposure-age database alpine, available at:, last access: 9 August 2020. 
Benson, L., Madole, R., Phillips, W., Landis, G., Thomas, T., and Kubik, P.: The probable importance of snow and sediment shielding on cosmogenic ages of north-central Colorado Pinedale and pre-Pinedale moraines, Quaternary Sci. Rev., 23, 193–206, 2004. 
Short summary
We investigate the timing and rate of retreat for three alpine glaciers in the southern Rocky Mountains to test whether they followed the pattern of global climate change or were majorly influenced by regional forcing mechanisms. We find that the latter is most likely for these glaciers. Our conclusions are based on a new 10Be chronology of alpine glacier retreat. We quantify retreat rates for each valley using the BACON program in R, which may be of interest for the audience of Geochronology.