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

CRONUS-Earth online calculators:



Current stable versions: These reflect the calculation methods and calibration data described in a 2008 paper with several updates described on the documentation page . Use these unless you have a particular reason to use the developmental or archived versions.

10Be - 26Al measurements - Version 2.2:

Calculate exposure ages (2008 production rate calibration data set)
Calculate exposure ages (alternative published production rate calibration data sets)
Calculate surface erosion rates (2008 production rate calibration data set)
Calculate topographic shielding
Instructions and documentation

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. They appear on a separate page.

Archived versions: These have been superseded by the current stable version, but they are archived here so that calculations done in the past can be reproduced. They appear on a separate page.
"In the cloud since 2006"

Contact: Greg Balco, Zach Ploskey

This website is supported by the U.S. National Science Foundation via the CRONUS-Earth project,
hosted by the Cosmogenic Nuclide Lab, University of Washington,
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