I don’t recall—seemed like there were several dating means used.
I don’t believe in a 6000 year old earth. There are Chinese writings from 7,000 years ago. And the civilization in current India that evidenced atomic warfare was many thousands of years older than that, IIRC.
I’m not saying God COULD NOT have done it the 6000 year way.
I’m just totally convinced that HE DID NOT. AND, that it doesn’t make any difference. Scripture, to me, does NOT AT ALL indicate that the world is only 6000 years old. I think those are assumptions and postulations layered onto Scripture.
I’ve often wondered . . . is earth a boot camp for those to rule and reign with Christ—only from a brief slice of our history—or does God periodically mush it all over and start over with a new process to raise up very well tested and trained folks to rule and reign with Him over the multiverses?