duplicate content from old query string URLs?

[breham]

Hi,

My site used to run as a plog and pages looked like this:

http://www.example.com?p=16

Now that the site is no longer a blog google is still spidering the above url.

When you type that URL into the browser it opens up the home page of the site i.e. http://www.example.com

Therefore my question is: Am I being penalised for dupe content as google is spidering

http://www.example.com
http://www.example.com?p=1
http://www.example.com?p=2 etc etc.

All of the above urls return the same page. Can anyone advise on the best method of telling google (or others) that p=1 and p=2 don't exist?

Hope I'm making some sense!
Brett

[edited by: engine at 3:07 pm (utc) on Aug. 24, 2007]
[edit reason] examplified [/edit]

[g1smd]

Set up a 301 redirect back to www.domain.com/.

This will keep the traffic while those URLs appear in the SERPs, while telling Google to transfer PR to the "bare" URL, and delist those URLs with extra parameters.