A Timescale is a scale used to represent periods of time ... An Index fossil is any animal or plant preserved in the rock record of the Earth that is characteristic of a particular span of geologic ...

A new archaeology is being developed based on evidence of human activity in the Earth’s sedimentary record, and ...

The geologic time scale provides the official framework for our understanding of Earth’s 4.5 billion-year history. Geologists break down our planet’s history into eons, eras, periods ...

As far as the geological community is concerned, the Earth has not entered a new phase ... Epoch as a formal unit of the Geologic Time Scale is approved." The vote in question, the results of ...

The Earth is no ... This huge geological event resulted in a massive change in the age of rocks, as older layers were eroded and replaced by younger sediment. The scale of this erosion is whooping ...

Geologic Time is a crucial concept to understanding the history of the earth—including the evolution of life ... We will provide a list of web sites with relevant information. The geologic time scale ...