The regular order of occurrence of fossils in rock layers was discovered around 1800 by William Smith.Geologist Ralph Harvey and historian Mott Greene explain the principles of radiometric dating and its application in determining the age of Earth.
Relative and radiometric dating
Should, however, you want to know the absolute age in terms of years (plus or minus a bit), then radiometric dating is generally the method which can tell you that, if applicable.
With some more recent deposits, peat bogs come to mind, you can produce sensible estimates without absolute dating.
The thing with dating is to use all methods that are available, so as to get as reliable result as possible.
People shouldn't be trying to find the date they believe would be correct.
Radiocarbon dating is one kind of radiometric dating, used for determining the age of organic remains that are less than 50,000 years old.
For inorganic matter and for older materials, isotopes of other elements, such as potassium, uranium, and strontium, are used.
Mikhail Marov of the Vernadsky Institute of Geochemistry and Analytical Chemistry said scientists had determined the meteorite's age by observing the amount of radioactive isotopes and their decay byproducts, a technique called of a granodiorite at the Cuttaburra A prospect indicates that this mineralised system may be Middle Silurian in age and thus indicating that the host rocks are older than those hosting the Cobar-type deposits.
Two general processes used to figure out the age of rocks is relative dating and radiometric dating.
Relative dating by biostratigraphy is the preferred method in paleontology and is, in some respects, more accurate.
The Law of Superposition, which states that older layers will be deeper in a site than more recent layers, was the summary outcome of 'relative dating' as observed in geology from the 17th century to the early 20th century.
These strata make up much of the famous prominent rock formations in widely spaced protected areas such as Capitol Reef National Park and Canyonlands National Park.