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Relative age dating also means paying attention to crosscutting relationships.

Say for example that a volcanic dike, or a fault, cuts across several sedimentary layers, or maybe through another volcanic rock type.

In a way this field, called geochronology, is some of the purest detective work earth scientists do.

There are two basic approaches: relative age dating, and absolute age dating.

Libby received the Nobel Prize in Chemistry for his work in 1960.

The radiocarbon dating method is based on the fact that radiocarbon is constantly being created in the atmosphere by the interaction of cosmic rays with atmospheric nitrogen.

The method was developed by Willard Libby in the late 1940s and soon became a standard tool for archaeologists.Thanks to Astronomy Notes reader Katie Cook for locating several of these resources.Finding the electron dot structure of an element is the first step to understanding how elements bond and form ions.These dot diagrams are made for neutral atoms, meaning atoms that have the same number of electrons as protons.The number of protons (also called the Atomic Number) of an element makes it what it is.

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