They're talking about the mineral content of the water. I'm talking about the water itself. Water isn't distributed evenly underground. Even an inch or two can make a huge difference.
I don't understand what you are saying. Buried bones take up fluorine from surrounding soils. The amount of fluorine taken up is proportional to the amount in the surrounding deposit and the length of time the bone has been buried. Varying concentrations of fluorine in different deposits preclude the method from being considered absolute, but it can be used to measure the relative ages of bones found in the same deposit.
Are you saying that geologists don't know how to measure fluorine amounts in the surrounding soil? Or what, exactly?
But not all are privy to revelations from the evogods, and those who aren't face a choice: reason in circles, or decline to reason in circles. You absolutely must assume evolutionism is truth before you can imagine the existence of an "index fossil".
For purposes of verification, it's obvious neither flourine evodates or index fossil evodates are remotely close to sufficient.
Yet strangely, you have given no evidence for why you do not "believe in" index fossils, nor is there any inidcation that you looked at the link I provided which gives evidence for millions of years of foraminifera evolution, unbroken throughout the fossil record. These kinds of fossils are found so reliably in specific layers around the world that they can give information about the age of other fossils found with them. Regardless of water or fluorine.
By now you will of course be aware that personal refusal to accept evidence has no bearing on the evidence itself.
