The Mutilation of Uranus by Cronus. Georgio Vasari and Cristofano Gherardi, Palazzo Vecchio, Florence, c. 1560.


The online exposure age and erosion rate calculators formerly known as the CRONUS-Earth online exposure age and erosion rate calculators(*)

Development versions

Developmental versions: These versions are in active development, are very likely to contain errors, may not work at all, and may be offline for changes at any time. On the other hand, they have more features than the stable versions. The only reason to use these is if you're participating in the development or if you want to use a particular feature that's not in the stable versions. The stable versions appear on the main index page.

Version 3

Calculates exposure ages for all commonly used nuclide-mineral pairs where production is dominantly by spallation (e.g., not Cl-36). New features include a different (better) input/output format for multiple-nuclide data, arbitrary paired-nuclide plots, a fast LSDn implementation, and summary stats on age data from a single landform. Now also includes production rate calibration.

Calculate exposure ages

Production rate calibration


36Cl - development:
Proto-Cl-36 calculator from 2002
(Not at all updated. Doesn't do much. Almost manages to calculate the complete production/depth profile. Uses an interesting numerical diffusion scheme.)
"In the cloud since 2006"

Contact: Greg Balco

Initial development of this website was supported by the U.S. National Science Foundation via the CRONUS-Earth project.
Hosted by the Cosmogenic Nuclide Lab, University of Washington
and powered by GMT, ImageMagick, and GNU Octave