The implied Bible chronology that the Creative Days were only 7,000 years each is based on the concept that the millennium, the 1000-year reign of Christ would fulfill the Great Sabbath within the last Creative Day. I agree with this assessment.
However, when it comes to dinosaurs and how old they are, science can't really determine that. For instance, for non-fossilized dinosuar bones they found which they try to test with RC14 dating, the dating doesn't go back past 30,000-50,000 years. So what they tested they got results within the range of the Bible's timeline. If we presume the dinosaurs are the "great sea monsters" mentioned in the Bible that were created on the 5th day, then they would max out at around 20,000 years. Some of the RC14 testing has only reached back to 9,000 years.
21 And God proceeded to create the great sea monsters and every living soul that moves about, which the waters swarmed forth according to their kinds, and every winged flying creature according to its kind. And God got to see that [it was] good. 22 With that God blessed them, saying: “Be fruitful and become many and fill the waters in the sea basins, and let the flying creatures become many in the earth.” 23 And there came to be evening and there came to be morning, a fifth day.
But this is a huge controversy about the dating as noted below:
"Finding this fossil wood in Jurassic limestone suggested the possibility of testing for the presence of radiocarbon ( 14 C). Most geologists, however, would not bother with such tests because they wouldn’t expect any 14 C to still exist. With a half-life of only 5,570 years, no 14 C should be detectable after about 50,000 years, let alone millions of years, even with the most sensitive equipment. So this fossilised wood from the Marlstone Rock Bed of Jurassic ‘age’ had potential for testing the validity of the fossil dating technique underpinning modern geology."
Here's the entire article: http://www.answersingenesis.org/creation/v22/i2/geology.asp
So while they are dating things millions of years, there are contradictions and challenges and so it is simply not absolute at this point. Some lava flows, for instance, not more than 50 years old gave by argon gas dates back to millions of years, but that's because of the abnormal concentration of the gas in the lava flow, an anomaly. Thus who knows what was going on in the atmosphere way back when which results in some of these exaggerated dates. And since RC14 is not useful past a certain period less than 50,000 years, that method cannot be used for dating non-fossilized dinosaur bones.
Apparently, one argument is that zero carbon should be found in any dinosaur bones if they are older than 50,000 years, yet some has been found in nonfossilized bone. How do you get around that?
In the meantime, in case you haven't seen, there's a group called AiG which deals with all the arguments. Because everything is inconclusive, it's not in a position to adequately challenge the Bible's timeline at this time.
http://www.answersingenesis.org/
You might want to check out the website regarding specific dating issues.
My position is that for all the millions of years the scientists claim, plus claiming there was no global flood, "written history" and all kinds of advanced astronomy, medicine and archicture suddenly appear in abundance but only going back about 4,000 years! Which aligns with the Bible's timeline for development after the flood. Why was man so backward for millions of years and then suddenly became so smart in the last 4000 years? Further, those ancient Egyptians and Sumerians are clearly not ape men but men just like us today.
So I just dismiss these dating issues from science, which only pertains to living materials, as inconclusive, especially when hardcore archaeology doesn't date past 4000-5000 years. Since the dating claims of millions of years is solely based upon a narrow range of scientific study, something we can't double-check ourselves, people hold on to their belief in the Bible and it's timeline.
JC