Buz writes on the Debate thread:
The PG problem is growing. When radiometrically dating the strata, as some in PG are stating, the method, when applied to strata, does not factor my wall analogy.
Jon now admits that radiometrical dating is seldom used in strata. This brings us back to square one; my contention that the strata is usually dated by the fossils in it and the fossils are dated by the strata; circular reasoning and poor science, imo.
Buz, whenever your opinion or understanding of an issue seems to be at odds with science, you really should bet on science. It has a track record.
But of course if your mind can't be changed by facts and evidence, why are you even bothering to debate? You preaching?
Let me put this into baby talk:
The geological record comes in layers, or strata. Some of those can be dated by radiometric means while others can't.
Usually the volcanic layers can be dated this way, while sedimentary layers can't be.
As was pointed out above, if we have a volcanic layer at, say, 90 million and another lower layer at 100 million, any sedimentary layer in between has to be between 90 and 100 million.
Now many of these sedimentary layers have unique fossils because of evolution. These fossils are not found in other layers.
So, using our example above, if we have a particular unique fossil in that layer dated between 90 and 100 million, we can assume that same age if we find that fossil in other contexts. This would be called an "index fossil." If a particular index fossil is well dated from many places to a particular age range, then it in turn can be used to date the layers in which it is found without the need to do expensive radiometric dating. And in some places the volcanic layers might be eroded away, but we still have a reliable means for dating the sedimentary layers by the fossils.
If you are having trouble following this, let's use a similar analogy--the Buffalo nickel. If you find such a coin with the date worn off what is it's age? Since that coin was only made from 1913 to 1938, we can assume it was within that age span because of it's unique design and it's well-dated context.
Same with fossils.
This is not circular reasoning to anyone but a creationist trying to obscure the facts to agree with a particular religious myth.
Religious belief does not constitute scientific evidence, nor does it convey scientific knowledge.