No, it did not say that it was between 6000 and 7000 years old. The timeline of what the Bible has said is MORE THAN 6000 YEARS OLD>not between 6000 and 7000 but more than 6000 years old; theres a difference.
Now for an extra piece of knowledge you need in that compacted brain of yours:

Man's answer for every puzzling question concerning God and His Plan
Deuteronomy 29:29
"The secret things belong unto the Lord our God: but those things which are revealed belong to us and to our children forever, that we may do all the words of the law"