Note change in Version 2.2:
Production rates and decay constants have been updated in this version to reflect the Be-10 restandardization and half-life revision
in Nishiizumi et al., 2007. Thus, you must now specify how your your Be-10 and Al-26 measurements have been normalized. This means
that two input fields, the Be-10 and Al-26 standardizations, have been added. You'll need to add two columns to your spreadsheets before cutting and
pasting data. For a list of currently available standardizations, see this page.
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calculate each exposure age. If the timeout setting on your browser is too short, it will stop
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will have to submit fewer samples at once.
This form is designed to have text pasted into it from a text
editor or an Excel spreadsheet. The formatting requirements are unforgiving, but easy to follow once you have a spreadsheet set up appropriately.
An example spreadsheet is here.
The rules are as follows:
In most cases, pasting directly from an Excel spreadsheet
should satisfy the rules. An example of an acceptable input text block
The fifteen elements are as follows:
- Enter plain ASCII text only.
- Each sample should occupy its own line.
- Each line should
have fifteen elements, as described below.
should be separated from each other by white space (spaces or
- Something other than white space must be entered for each
element. For example, if you have no Al measurements for a sample, you
must enter "0" in the Al concentration and Al uncertainty positions.
Note: Nuclide concentrations should already take account of carrier and process blanks.
Here is an example of an acceptable input text block. You can paste this in above to try a sample
- Sample name. Any text string not exceeding 24 characters.
Sample names may not contain white space or any characters that
could be interpreted as delimiters or escape characters, e.g.,
slashes of both directions, commas, quotes, colons, etc. Stick to letters, numbers, and dashes.
- Latitude. Decimal degrees. North latitudes are positive. South latitudes are negative.
- Longitude. Decimal degrees. East longitudes are positive. West longitudes are negative.
- Elevation/pressure. Meters or hPa, respectively, depending
on selection below.
- Elevation/pressure flag. Specifies how to treat the
elevation/pressure value. This is a three-letter text string. If you have
supplied elevations in meters and the
standard atmosphere is applicable at your site (locations
outside Antarctica), enter "std" here. If you have supplied elevations in
meters and your site is in Antarctica, enter "ant" here. If you have entered
pressure in hPa, enter "pre" here. Any text other than these three options
will be rejected.
- Sample thickness. Centimeters.
- Sample density. g cm-3.
- Shielding correction. Samples with no topographic shielding, enter 1.
For shielded sites, enter a number between 0 and 1.
- Erosion rate inferred from independent evidence. cm
- 10Be concentration. Atoms g-1. Standard or scientific
- Uncertainty in 10Be concentration. Atoms g-1. Standard or scientific
- Name of Be-10 standardization. Text. Acceptable values for this parameter are given on
- 26Al concentration. Atoms g-1. Standard or scientific
- Uncertainty in 26Al concentration. Atoms g-1. Standard or scientific
- Name of Al-26 standardization. Text. Acceptable values for this parameter are given on
PH-1 41.3567 -70.7348 91 std 4.5 2.7 1 8e-5 123500 3700 KNSTD 712400 31200 KNSTD
01-MBL-059-BBD -77.073 -145.686 712 ant 4.75 2.65 0.997 0 353000 8000 KNSTD 1940000 49000 KNSTD
NH-1 57.968 -6.812 790 std 3 2.65 1 0 943000 28000 KNSTD 0 0 KNSTD
Here is an Excel spreadsheet containing example data that you can paste
in above to try a sample calculation.