Whoops, no more Pleistocene

Whoops, no more Pleistocene

You may not be aware of this but we are living in a new geological epoch. It is called the Anthropocene.

This is actually quite momentous because there have not been many epochs to date; just eight in 66 million years. On average one every 8 million years. So to be alive when one starts is remarkable.

Epochs are a subdivision of geological time used for more recent periods of geological that are well defined by the fossil record.

This brand new one has our name on it. Geologists have decided that the Holocene has ended because humans have altered enough global processes in the oceans, land and atmosphere to warrant a new epoch. This is a big call.

Remember that the earth is huge and we are small. The volume of ocean water alone could swallow us all in an instant and may well do this to our coastal cities. So to say that humans have done enough in a little over 10,000 years — before this time there were only a few of us wandering around doing what other mammals were doing — to create a new geological time period is remarkable.

Global atmospheric, ocean and landform generating processes altered by a single species of primate. Really?

Of course, the division of the distant past into discrete periods is a human invention, a way to section geological history into units to make life easier for geologists. It helps them explain unfathomable lengths of time and to generate details that high school students must memorise. No surprise then that we chose to name one after ourselves.

It is the ultimate recognition of our success.

Human ingenuity and skill are now so pervasive it has changed the way the planet works. We have become the ultimate ecosystem engineer. It is a proud and, dare I say, noble achievement. As the bible says “take dominion” and this we have done.

We have fulfilled our own prophecy.

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