Our activities, and the time scale for download above, focus primarily on two of those divisions most relevant for an introduction to geologic time: eras and periods. The beginning and end of each ...

Understanding the geologic time scale and how to organize Earth’s history into a coherent timeline. MS-LS4-1: Analyze and interpret data for patterns in the fossil record that document the existence, ...

The geologic time scale was not entirely intentional, at least at its start. In the early 1800s, geologists began to create maps and descriptions showing where different types of rocks occurred ...

One important moment in geologic time was the transition from the Mesozoic era to the Cenozoic era about 65 million years ago. ... The geologic time scale is a scientific tool, ...

"Despite its rejection as a formal unit of the Geologic Time Scale, Anthropocene will nevertheless continue to be used not only by Earth and environmental scientists, but also by social scientists ...

Prehistoric time line, geologic time scale, photos, facts, maps, ... And 64 million years after dinosaurs went extinct, modern humans emerged in the Cenozoic era.

The Geologic Time Scale 2012, or GTS2012, is the latest understanding of Earth's history, and the means by which geoscientists around the world investigate the rock record.

Geologists break down our planet’s history into eons, eras, periods, epochs and ages — with an eon being the largest chunk of time and an age the shortest. For example, we currently live in ...

It’s official — you’re living in a new age. It’s called the Meghalayan, and geologists say it's marked by a 'mega-drought' and the collapse of civilizations 4,200 years ago.