Does anyone have any idea where would I might look for a report of 
the Earths' Weather conditions for the past 500,000 years? What I am 
seeking is a line graph ( or whatever) that describes the highs and 
lows of Earths' weather over the past years. This is to be used to 
identify cold and warm phases on earth.
Your recommendations will be greatly appreciated.

David T. Parkhill
Texas Archaeological Research Laboratory