history carbon dating

Give a Gift of Stock. The proportion of C in the atmosphere, and hence in living things, is not constant but varies over the centuries, and it also varies between the atmosphere and the oceans. Dendrochronology, also known as tree-ring dating, depends upon the preservation of certain tree species; it can extend to about 12, years ago for oak trees and to 8, years for bristlecone pine. It is widely used in dating fossils or archaeological samples containing organic material such as wood, charcoal, bone, shells, etc. Origins 15 Loading results Carbon is used to date materials that were once living and still contain measurable amounts of 14 C atoms.

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