We will look at a few index fossils and see if we can figure out the order they would fall on the geologic timescale ... Then mark the end of each Era. Color the Eras based on their official color.

has had enough of an impact to create what can be considered a new geologic era. After all, scientists repeatedly remind us that our rapidly-heating planet is sending us into "uncharted territory ...

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Previously geologic eras lasted for millennia, and changes came due to "natural fluctuations in temperature on the planet or glacial ice ages and mini ice ages, or even asteroid strikes ...

There are three general approaches that allow scientists to date geological materials and answer the question: "How old is this fossil?" First, the relative age of a fossil can be determined.

We will provide a list of web sites with relevant information. The geologic time scale is divided into eons, eras, periods, epochs, and ages. Our activities, and the time scale for download above, ...