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middle_layer [2021/09/02 21:45] – created gregbalcomiddle_layer [2021/09/08 20:52] (current) – gregbalco
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 +===== Middle layer =====
 +
 The middle layer contains the calculations needed to turn raw observational data into some kind of useful geologic information.  The middle layer contains the calculations needed to turn raw observational data into some kind of useful geologic information. 
  
 For exposure-age dating, it is the calculations needed to compute an exposure age from a nuclide concentration measurement and related data about the sample location, etc., etc.  For exposure-age dating, it is the calculations needed to compute an exposure age from a nuclide concentration measurement and related data about the sample location, etc., etc. 
 +
 +===== Middle-layer calculation services =====
 +
 +This is a list of the services that can be used for middle-layer calculations. 
 +
 +=== Online exposure age calculator v3 ===
 +
 +This is the online exposure age calculator originally described by Balco and others (2008) and subsequently updated. Typically this is used through a web browser -- a user pastes data into form inputs on a web page and pushes a button; the web server returns another page with formatted results. It can also be used without the browser as a "web service" that receives an HTTP request from any software client and returns results as a text string in the XML format.
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 +This service calculates exposure ages from measurements of He-3 in quartz, pyroxene, or olivine; Be-10 in quartz; C-14 in quartz; Al-26 in quartz, and Ne-21 in quartz.  
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 +[[pluginto:exposure_ages_v3|How to use the online exposure age calculator as a web service]]
 +
 +=== Online erosion rate calculator v3 ====
 +
 +This is basically the same thing, only it calculates steady-state erosion rates instead of exposure ages from the nuclide-mineral pairs listed above. Note: there is no erosion rate calculator for chlorine-36. 
 +
 +=== Online exposure age calculator v3, chlorine-36 version ===
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 +This is basically the same thing, only it computes surface exposure ages from Cl-36 concentrations in any geologic target (within reason). Again, it can be accessed either manually using a browser or programmatically as a web service. Note: there is no erosion rate calculator for chlorine-36. 
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