relative dating uses what to estimate how old a fossil is

The half-life of carbon is 5, years, so carbon dating is only relevant for dating fossils less than 60, years old. While people are most familiar with carbon dating, carbon dating is rarely applicable to fossils. Because rock sequences are not continuous, but may be broken up by faults or periods of erosion, it is difficult to match up rock beds that are not directly adjacent. Explore This Subject. Tile 15 Description. Archaeologists seek to place discoveries within a broader historical framework; in other words, to get a sense for the time period that an object comes from and how it relates to other finds, times, and places in the archaeological record. For instance, the extinct chordate Eoplacognathus pseudoplanus is thought to have existed during a short range in the Middle Ordovician period.

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