This example gives us the number of years, but that is the only real professional specific. (job-interview-site.com)
While I want to praise the DPS administration for taking this so seriously, it's unfortunate that this was not discovered earlier given the number of years this may have been occuring. (apluscolorado.org)
Dating individual fossils is a relatively straightforward (and approximate process) using stratigraphy, radio - isotope dating, looking at index fossils, or Dating Calculator: To find the percent of Carbon 14 remaining after a given number of years, type in the number of years and click on Calculate. (myintimcity.com)