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, ...

As a period of geologic time, the boundaries of the Triassic are defined on the basis of rocks and the fossil record. It was the German geologist Friedrich August von Alberti who first marked the ...

Time is fundamental to Earth science. Geochronology data are essential for determining the timing, duration, and rates of Earth processes and events, and are increasingly required to perform modern, ...

Each brachiopod has two hard outer shells covered with ridges. Brachiopods are still living in today’s oceans, but there are much fewer species now than there were during ancient geological time ...

The geological time scale, established by scientists in ... dividing the history of life into eras, periods, and epochs based on fossil evidence. In this feature, explore the history of life ...

According to this view, a once-tumultuous period of change had slowed to ... of the forces Lyell believed had operated over geological time to produce the world we see now. "The present is the ...

That’s three geological time periods. And for that reason, in 2001, the United Nations designated the Jurassic Coast, a World Heritage Site. Alongside iconic places like, the Great Barrier Reef ...

Geologists have assigned the present time to the Holocene Epoch of the Quaternary Period, part of the Cenozoic Era, on the time scale of the 4.6-billion-year history of the Earth. However ...