Calculate Exposure and Erosion History

Please fill in the relevant information from a single sample below. The computations take several minutes, so make sure the information is correct before submitting. Click the info_outline symbols for more information on the parameters and their input formats. Use dots (.) as decimal separators.

 

General information
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TCN sample depth(s) [m]
Please specify the depth beneath terrain surface where the samples are collected. It is assumed that the same TCN concentrations have been determined at all specified depths. Enter multiple depths using comma separation.
Concentrations of terrestrial cosmogenic nuclides (TCNs) [atoms g-1] 
For each sample depth specified above, please specify the nuclide concentration(s). Fill in at least one field, leave unknown values blank. Scientific notation (e.g. 5.67e5) is recommended. If several depths are entered above, enter the corresponding isotope concentrations using comma separation.
TCN concentration uncertainty [%]
For each TCN concentration inserted above, please specify the percentwise concentration uncertainty.
TCN production rates (spallation) [atoms/g/yr]  
For each TCN concentration inserted above, please specify the production rate by spallation. Values can be estimated using CRONUS-Earth.
TCN production rates (muons) [atoms/g/yr]  
For each TCN concentration inserted above, please specify the total production rate by muons. Values can be estimated using CRONUS-Earth.
Rock density [kg m-3]
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Erosion rate limits during glacials and interglacials

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Deglaciation age
Estimate the lower and upper bounds for the deglaciation age at the site of sampling. This value is most often constrained from best knowledge, 14C dating, or traditional exposure dating.

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Climate record Required
The evolution between glacials and interglacials is expected to follow a climate record. You may use one of the global marine records below, or upload your own record. Smoothed records have fewer short-lived peaks and troughs.

Climate record threshold limits
The erosion rate is expected to alter between glacial and interglacial values when the climate record passes an unknown threshold value. Specify realistic lower and upper limits for this threshold value below.
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Number of inversion walkers
Choose the desired number of Metropolis-Hastings Markov-Chain Monte Carlo random walkers. Low values produce results quickly, while more walkers can indicate uniqueness and certainty of the solution. Approximate computation time is 2 minutes per walker.
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