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I have an issue of duplicate content errors and duplicate page titles which is penalising my site. This has arisen because a number of URLs are suffixed by date(s) and have been spidered . In principle I do not want any url with a suffixed date to be spidered. Eg:- www.carbisbayholidays.co.uk/carbis-bay/houses-in-carbis-bay/seaspray.htm/06_07_13/13_07_13 http://www.carbisbayholidays.co.uk/carbis-bay/houses-in-carbis-bay/seaspray.htm/20_07_13/27_07_13 Only this URL should be spidered:- http://www.carbisbayholidays.co.uk/carbis-bay/houses-in-carbis-bay/seaspray.htm I have over 10,000 of these duplicates and firstly wish to remove them on block from Google ( not one by one ) and secondly wish to amend my robots.txt file so the URL's are not spidered.  I do not know the format for either. Can anyone help please.