It's Crawford Lake in Canada which they are proposing as a kind of geological 'type specimen' https://en.wikipedia.org/wiki/Type_(biology) https://en.wikipedia.

It's Crawford Lake in Canada which they are proposing as a kind of geological 'type specimen' https://en.wikipedia.org/wiki/Type_(biology) https://en.wikipedia.org/wiki/Type_(biology) or 'golden spike' for the onset of the Anthropocene https://en.wikipedia.org/wiki/Anthropocene https://en.wikipedia.org/wiki/Anthropocene