A complete and easily accessible means of calculating surface exposure ages or erosion rates from 10Be and 26Al measurements

On the reconstruction of palaeo-ice sheets: Recent advances and future challenges

“…Balco et al, 2009;Young et al, 2013;Heyman, 2014) compared to the original CRONUS production rates (e.g. Balco et al, 2008), implying that many exposure ages are likely to be thousands of years older than previously reported. For example, Ballantyne and Stone (2012) recalculated the exposure ages of 22 boulders from moraines in northwestern Scotland based on new locally calibrated 10 Be production rates, increasing the original mean exposure age by 6.5-12%, and suggesting that the ice retreated much earlier and did not persist throughout the Lateglacial Interstadial.…”

Investigating the glacial history of the northern sector of the Cordilleran Ice Sheet with cosmogenic 10Be concentrations in quartz

“…Table 1 shows sample details and exposure durations calculated with the CRONUSEarth exposure age calculator v2.2 (http://hess.ess.washington.edu/math; Balco et al, 2008).…”

“…We use the Lm scaling scheme for our reported exposure durations, however, it should be noted that for the measured samples all schemes (Lm, Du, Li, De;Balco et al, 2008) yield statistically indistinguishable results at 1 sigma. Calculated exposure durations are given with 1 sigma systematic uncertainty, which includes the analytical measurement uncertainty and the uncertainty in the reference cosmogenic nuclide production rate of 4.39±0.37 atom/g(SiO 2 )/yr (http://hess.ess.washington.edu/math).…”

Prospecting Glacial Ages and Paleoclimatic Reconstructions Northeastward of Nevado Coropuna (16° S, 73° W, 6377 m), Arid Tropical Andes

“…Bromley et al [37,38] used the CRONUS online calculator [31] to estimate the 3 He ages from 30 moraine boulder surfaces, in the Huayllaura valley (southwestward), the Chico valley (westward) and the Santiago and Mapa Mayo valleys, westward of the study area of this work (Figure 1), naming the last one as Ullullo valley. Bromley et al [37] defined a lower moraine group (~5000-4900 m), extending to the lower area of the glacial valleys, as CI and a higher moraine group (~5500 m), deposited in the middle part of the Santiago valley, as CII.…”