Dating sites ar

05 Dec

Earth's oldest living inhabitant "Methuselah" at 4,767 years, has lived more than a millennium longer than any other tree.

Using these key or index fossils as markers, Smith could identify a particular layer of rock wherever it was exposed.Because fossils actually record the slow but progressive development of life, scientists use them to identify rocks of the same age throughout the world.See more information about "Strata" Smith and his original geologic map of England.The Major Divisions of Geologic Time are shown here, arranged in chronological order with the oldest division at the bottom, the youngest at the top. Specifically, stratigraphy refers to the application of the Law of Superposition to soil and geological strata containing archaeological materials in order to determine the relative ages of layers.Cross-dating is a technique used to take advantage of consistencies in stratigraphy between parts of a site or different sites, and objects or strata with a known relative chronology.