Relative Dating, Example 1
Relative dating uses the principles or laws of stratigraphy to order sequences of The law of superposition is the foundation of Steno's work on stratigraphy.
As the fluorine content in a fossilized bone is fixed in amount, a fossilized bone which has been washed out of a much older deposit and re-deposited in a younger one will have higher fluorine content than fossil bones of younger deposit. This method is particularly useful when bones have accumulated in sand and gravel deposits, but difficulties have been found in lime stone deposits where continue reading has been observed that the accumulation of fluorine ions on the bone is inhibited whereas the decay of organic matters in bone proceeds at normal rates Lowe and Walker, Fluorine dating was used to uncover the Piltdown hoax, in which a skull was fabricated from bones of different species and age and allegedly represented a human ancestor Truncer,cited in Pearsal, Pollen Analysis: This method of dating is sometimes known as Palynology.
It is the microscopic identification of the pollen grains of particular species of plants in soil samples recovered from a particular site. Source identifying the plants growing in a locality at some time in the what is the foundation of relative dating, and by counting the relative number of pollen grains from different plants in a Stratigraphic sequence, it becomes possible to develop pollen diagram which summarizes the shifting of vegetation pattern over time.
Work on pollen began in Scandinevia in the s and it confirmed the general pattern of climatic change that had been proposed from visible plant remains. The value of this technique for archaeology lay in the fact that climatic phases were likely to have been fairly uniform for a particular region.