Our understanding of the shape and pattern of the history of life depends on the accuracy of fossils and dating methods some critics, particularly religious fundamentalists, argue that neither fossils nor dating can be trusted, and that their interpretations are better. Fossils themselves, and the sedimentary rocks they are found in, are very difficult to date directly instead, other methods are used to work out a fossil’s age these include radiometric dating of volcanic layers above or below the fossils or by comparisons to similar rocks and fossils of known.
Many times paleontologists will never know exactly how old a fossil is usually they guess its range or span of time a good way of guessing the range is to look at the layers of rock that were.
The most common way to determine the age of an object containing organic material, say fossils, is by radiometric dating, the most common method being radiocarbon dating the most common isotope of carbon is carbon-12, meaning that an atom thereof has 12 neutrons. One way is by using relative dating which is determined by comparing it's placement to fossils in other layers of rock to tell how old or young it is compared to the other ones another way is readioactive dating and this can be done by calculating the age of a sample based on the amount of remaining radioactive isotopes it contains.
Absolute dating is used to determine a precise age of a rock or fossil through radiometric dating methods this uses radioactive minerals that occur in rocks and fossils almost like a geological clock.
Scientists use two kinds of dating techniques to work out the age of rocks and fossils the first method is called relative dating this considers the positions of the different rocks in sequence (in relation to each other) and the different types of fossil that are found in them. Left and right, archaeologists are radiocarbon dating objects: fossils, documents, shrouds of turin they do it by comparing the ratio of an unstable isotope, carbon-14, to the normal, stable.
Fossils and relative dating fossils are important for working out the relative ages of sedimentary rocks throughout the history of life, different organisms have appeared, flourished and become extinct. Paleoanthropological methods: dating fossils archaeologists will date any old thing argues that this makes dating follow from a belief in evolution rather than the other way round, and so we should reject estimates of an ancient earth (as well as evolution) as based on circular logic so they are used mainly for dating different.