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This law allows a general age sequence to be established for layers or strata at a site or location.
Relative methods focus on comparison of fossils, strata, or other artifacts to determine which is older and which is younger.
This law is the important for stratigraphic dating, because fossils, bones, or other objects incorporated into these layers can be compared to each other to determine relative ages.
Those materials in the lowest layers are the oldest, while those that are in the highest levels are the youngest.
Biostratigraphic or faunal dating utilizes known dates of appearance or extinction for specific fauna to provide approximate dates of the strata in which they are found.
Cultural dating utilizes changes in form of various cultural objects, such as tools or pottery, to provide a general date for a stratum or site.
The chances of fossilization are very slim, because it requires that the remains be quickly buried and be kept in an oxygen-free environment.
Scavenger and bacterial activity must be prevented so that decomposition is limited.These specific required conditions explain why fossils are so rare. : The Making of the Biological Past Response: Since fossilization requires very unique circumstances, fossils are very rare.As a result, fossils do not necessarily provide a complete representation of the past.Fossils are found in a variety of rock, but most often in sedimentary rock, which forms from the accumulation of sediments.The replacement of organic materials with inorganic materials is not always complete, as DNA is sometimes preserved within the fossil.The DNA can then be analyzed to learn more about the organism.