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, ...

In total there’s more than 26 different types of rock, spanning Earth’s geological time periods. “Each of the rocks is associated with a time period,” explains Paul. To give you a sense of the length ...

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, ...

As its name implies, this includes all of geological time prior to the Cambrian period. Hadean Era (4,550-3,850 mya) The Precambrian's oldest era, the Hadean, predates most of the geologic record.

One way we can understand the effect of climate change is to look at the geological past - millions of years ago - and the fossil record, to see what happened to organisms during periods of time in ...

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 ...

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 ...