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Phoenix666 writes:

New Zealand sits on top of the remains of a giant ancient volcanic plume:

Back in the 1970s, scientists came up with a revolutionary idea about how Earth's deep interior works. They proposed it is slowly churning like a lava lamp, with buoyant blobs rising as plumes of hot mantle rock from near Earth's core, where rocks are so hot they move like a fluid.

According to the theory, as these plumes approach the surface they begin to melt, triggering massive volcanic eruptions. But evidence for the existence of such plumes proved elusive and geologists had all but rejected the idea.

Yet in a paper published today, we can now provide this evidence. Our results show that New Zealand sits atop the remains of such an ancient giant volcanic plume. We show how this process causes volcanic activity and plays a key role in the workings of the planet.

Journal Reference:
J.-P. Macquart, J. X. Prochaska, M. McQuinn, et al. A census of baryons in the Universe from localized fast radio bursts, Nature (DOI: 10.1038/s41586-020-2300-2)

The remains of Mt. Doom after the hobbits got finished with it?

Original Submission