dehammer wrote:
"tree rings are only good for the life of the tree. since there are no trees from preice age, that doe not give a long enough time frame."

I've already figure out that you are incapable of remembering what you wrote on a previous page. But you've sunk to a new low not even reading what you wrote on the same page. Here's a refresher:

"the problem with meteorlogist is that they dont look beyound the last few years."

Now lets try this again using very small words. Tree rings allow for tracking climate for more than "the last few years."

As Mark Twain said:
"It is better to keep your mouth closed and let people think you are a fool than to open it and remove all doubt."

DA Morgan