Happy New Year, BYOND. I might just have a resolution to try to keep.
It's unwise to trust Wikipedia. If there's other sources, I'd like to see them.
http://www.google.com/ search?hl=en&client=firefox-a&rls=org.mozilla%3Aen-US%3Aoffi cial&hs=mLM&q=accuracy+of+carbon+dating+60000&aq=f&oq=&aqi=
In the short description of the site, it will say something along the lines of "Reliable up to 60000"