When the geologic time periods were being named ... 359 million to 323 million years ago, and the later Pennsylvanian Period (named for rocks in that state) 323 million to 299 million years ...

This time period took place 359 to 299 million years ... (359.2 million to 318.1 million years ago) and the later Pennsylvanian (318.1 million to 299 million years ago). During the Mississipian ...

The first geologic time units were based purely on oceanic fossils ... One in Arrow Canyon, Nevada, marks the Bashkirian Age in the Early Pennsylvanian Epoch of the Carboniferous Period. One near ...

These key events frame the chapters in the story of life on earth and the system we use to bind all these chapters together is the Geologic Time Scale ... about each era, period by period.

In other words, what should we call this period of time when we started trashing the planet? And when did it begin? You might know some of the big Geologic Ages, Epochs, Periods, Eras and Eons.

It’s one of three newly designated ages divvying up the Holocene Epoch, a geologic time period kicked off 11,700 years ago by the end of the Ice Age. First came a warming period, now dubbed the ...

We thought we’d take a look at things over a much larger time period, so let’s dig into geologic time. A matter of time The Jurassic Period came during the Mesozoic Era, from 250 million ...

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 ...

The Anthropocene is the name of a proposed new geological time period (probably an epoch) that may soon enter the official Geologic Time Scale. The Anthropocene is defined by the human influence ...