10Be - 26Al exposure age calculator

For calculating an exposure age when erosion rate is known independently.

Multiple sample form -- Northeast North America calibration data set
Developmental version. June, 2009. Written by Greg Balco, balcs@bgc.org

 Calculators home

Production rate calibration tracking information:

Calibration data set name: Northeastern North America.

Reference: Balco, G., Briner, J., Finkel, R.C., Rayburn, J.A., Ridge, J.C., Schaefer, J.M., 2009, Regional beryllium-10 production rate calibration for northeastern North America. Quaternary Geochronology 4, pp. 93-107.

Link to raw calibration data

Note: production rates updated to reflect Be isotope ratio standardization of Nishiizumi et al. (2007).

Calibration wrapper version: 2.2-cal-dev
Objective function version: 2.2-dev
Age calculation version: 2.1
Muon calculation version: 1.1
Constants version: 2.2
Scaling scheme Reference Be-10 Percentage Reduced Reference Al-26
for spallation production rate (atoms/g/yr) uncertainty chi-squared production rate (atoms/g/yr)
St3.93+/-0.194.81.1326.54+/-1.27
De4.13+/-0.204.91.1127.87+/-1.36
Du4.16+/-0.204.91.1028.05+/-1.37
Li4.50+/-0.224.91.1830.33+/-1.48
Lm3.88+/-0.194.81.1026.15+/-1.27

Sample data entry:

Enter data block here.

Data entry for this form follows version 2.2:

Refer to the default v.2.2 input form here or the v.2.2 example spreadsheet here. For a list of currently available standards, see this page.

This website is supported by the National Science Foundation via the CRONUS-Earth project