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

CRONUS-Earth online 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 2.3
Attempt to incorporate what was learned from the CRONUS-Earth project while maintaining computational speed and ease of use. Working on this.

Prototype version 3
Calculates exposure ages for all commonly used nuclide-mineral pairs where production is dominantly by spallation (e.g., not Cl-36). Basic features only; mainly to test input/output format for multiple-nuclide data and scheme for generating arbitrary paired-nuclide plots. Link to input page

Compute exposure ages with alternative calibration data sets
These can now be accessed from the front page .

Generate a 10Be production rate calibration
This gives the option to generate reference 10Be production rates from calibration data sets of your choice. This page allows you to enter calibration data, and returns a new page that i) shows the results of the calibration, and ii) allows you to compute exposure ages using your calibration. This code has been pretty well tested and appears to be accurate. However, it remains on the developmental page due to an unresolved server-related problem that causes occasional crashes when one inputs a large number of calibration data. If you encounter this issue, please send me the input data and a description of the problem .

Establish a 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.)
"Spanning the globe to make sense of your AMS measurements"

Contact: Greg Balco

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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