How are rock layers really dated? Not by radiometric dating as many assume. Radiometric dating is used to corroborate the “assumed” age, after an age has been assigned. The rock layers are originally dated by the “index fossils” found in them. Radiometric dating gives such a wide range of ages that it can only be used after the general age has been already identified. Index fossils are fossils not observed very often in other layers of rock. 99% of fossils are found commonly in many rock layers, whereas there are a few rare fossils that are mostly confined to a single rock layer (although they can be observed in layers earlier and later in presumed age as well). If one finds an “index fossil,” then they assume that layer dates to the age of that fossil. So, how are these fossils dated? The truth is that it is evolutionary “theory” which is used to date these fossils, not the rocks they are found in. The rocks are dated by the index fossils which are theorized to have evolved in a certain age. There is no way of dating fossils, or rocks, with any reasonable accuracy. In fact, when mDNA (mitochondrial DNA passed down through generations only by the female), is available to be used as a dating technique by comparing it to mutation rates through time, it has been found that actual scientific evidence points to a young age, and no long ages of evolution are shown for various life forms. Actual scientific evidence points to a young age for life, whereas the conventional theory is long ages of evolution, even though there is no actual evidence to support these theories (for more, see the book Science, Origins, & Ancient Civilizations ).