The Bible does not IMO support a 7000 year cycle for all of Creation. The day of man is of course a 7000 year cycle, but all of Creation is not.
I cannot understand why any rational thinking persons could ever defend the idea that all of Creation is 7000 years old or less.
It is not supported by the text.
So, you're saying that one "day" of Biblical Creation, is an entirely, radically shorter "day" than others, that there is variance? That the day, yom, era, age, eon, or what have you, of Adam was 7,000 years, and all others were hundreds of millions of years?
Talk about not supported by the text, that's just bizarre.
And, where are you getting 7,000 years for this "yom?" That's unsupported by the text as well. The six days, plus the day of rest, under the interpretation of "yom" as a millennium, is 7,000 years, but that's seven days, not one.