Rules of relative dating

Principles of Stratigraphy Stratigraphy is the study of strata (sedimentary layers) in the Earth's crust.

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By carefully digging, we have found that each trash pit shows a sequence of layers.

Although the types of trash in each pit is quite variable, each layer has a distinctive kind of trash that distinguishes it from other layers in the pits.

Comparing the ratio of parent to daughter yields the age of the sample 1.

Radiometric dating is a complex procedure that requires precise measurement 2.

Because these units are used according to the rules of the metric system, the M in Ma and the G in Ga must be capitalized, and the k in ka must not be capitalized.

Geologist are often trying to learn more about Earth and its history.

Superposition of rock units is a very simple and straightforward method of relative age determination.

The principle states that in a sequence of undeformed sedimentary rocks the oldest beds are at the bottom and the youngest ones are at the top.

From the beginning of this course, we have stated that the Earth is about 4.6 billion years old.

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