Reston, VA – The U.S. Geological Survey (USGS) and the Association of American State Geologists (AASG) announced that they have developed an updated geologic time scale and color scheme for use in ...

Stand at the South Rim of the Grand Canyon and look down. The banded rock walls dropping nearly a mile to the Colorado River ...

Earth's 4.5 billion year geological history is full of death and rebirth, mass extinctions and explosions of biodiversity, with different periods often marked by cataclysmic changes that radically ...

Are we really living in the Anthropocene, the geological time marked by the global impact of human activity? And if so, when did it begin? These are questions that the Anthropocene Working Group is ...

A scientific panel has picked Crawford Lake, Ontario, to represent the Anthropocene, a proposed, and hotly contested, new chapter in geologic time. By Raymond Zhong For almost 15 years, a panel of ...

We begin the new year by taking a deep dive into an even deeper subject: the mysteries of geologic time. We leave the turbulent present to visit the past, exploring the West long before it became the ...

Introduction / F.M. Gradstein -- Chronostratigraphy : linking time and rock / F.M. Gradstein, J.G. Ogg and A.G. Smith -- Biostratigraphy : time scales from graphic ...

What are some events that all of us have had in our lives? Ask the class "What are some events that all of us have had in our lives?" Make a list of 5 or 6 things on the board. Let’s organize these!

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. Humanity has etched its way into Earth’s ...

The field’s governing body ratified a vote by scientists on the contentious issue, ending a long effort to update the timeline of Earth’s history. By Raymond Zhong The highest governing body in ...