Combining numerical and relative age dating

30-Jan-2020 16:15

Fossils are contained within sedimentary rocks, which are rocks that are formed over time from the accumulation of sediment, such as in a lake, ocean basin, or river.When those sediments become buried over time and eventually re-exposed, either in outcrops (exposed rocks) or road cuts, we can examine the rocks for its fossil assemblage.But how do we talk about time, and how do we know how old our rock formations are?The geologic timescale is the most common way geologists organize and communicate major periods of the Earth’s past.

combining numerical and relative age dating-36

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The eras are broken down into periods, which represent smaller units of time.Therefore, due to the very long half-life of uranium 238, we can use that element and its decay to lead to date the age of the Earth.

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