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

The online calculators formerly known as the CRONUS-Earth online calculators (*):

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

For some context about the various versions, see this.

Calculate topographic shielding

The version 3 family is stable for He-3 in pyroxene and olivine and Be-10, Al-26, Ne-21, and C-14 in quartz. Calculations for He-3 in quartz are available but subject to further development.

He-3, Be-10, C-14, Ne-21, and Al-26 - Version 3:

Calculate exposure ages
Calculate erosion rates
Production rate calibration

The previous stable version is 2.3. The version 2.3 exposure age and erosion rate calculators are still available on the archive page, but will no longer be supported. Production rate calibration using version 2.3 is no longer available.

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 might 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Archived versions: These have been superseded by the current stable version, but they are archived here so that calculations done in the past can be reproduced.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.

"You do the excavation...we do the computation."

It's the OC. Since 2006.

Contact: Greg Balco

Hosted by the Cosmogenic Nuclide Lab, University of Washington
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Initial website development in 2006-2008 was supported by the National Science Foundation via grant EAR-0345574.