Previously been dated at 10 million years the Rhine River has now been redated by a new study based on fossils of at a site associated with now adds an extra 5 million years to the river's estimated age for a total of 15 million years. The orrgional darw was most likely based on erosion rate but this study shows the fact that dating sites by the fossils at them supersedes other dating methods.
Using fossil dating first of all requires assuming evolution ass wellas the accuratcy of the methods used the fossil types to begin with. That this supremacy of fossil dating causes renders the concept of fauna succession totally un-testable by eliminating any way of objectively producing a relive date for fossil sites that could be used to test it.
Shuch problems are inherent in all methods used to date the past. A method bthat ecomes the standard for judging the results of other methods also becomes totally un-testable. Even worst it can result in circular reasoning when the date derived by a given method are used to support the assumptions of the dating method. In this case fossil dating which assumes evolution is used to date rocks and these dates are then used to support evolution, thus the circular reasoning.