Wait...say what?

When we think of New Hampshire's terrain, climate, and natural elements, our minds are set to contemporary times. We don't often stop to think about what our home might have looked like way back when.

And by "way back when," we mean 124 million years ago when dinosaurs roamed the Earth.

Obviously, the world as we know it once looked very different. That said, it may be surprising to hear that the Ossipee Mountain Range is on the site of what was once a 12,000-foot-tall volcano.

Today, what remains of this volcano is known as the Ossipee Caldera.

What is a caldera?

A caldera is described by National Geographic as a "large depression formed when a volcano erupts and collapses". It's basically like a large sinkhole.

According to a YouTube video from Geology Hub, the Ossipee Mountain Range is enclosed in a caldera, as the mountains cover a roughly circular area resembling the dimensions of such a crater. This particular caldera is approximately nine to 10 miles in diameter.

So wait...this means that at one point there was a volcano in New Hampshire?

Yep, it's true.

The video explains that through a series of events over 100 million years ago, a hot spot made its way to New Hampshire. National Geographic defines hot spots as regions "deep within the Earth's mantle from which heat rises through the process of convection."

Over time, this hot spot caused a series of explosions which created a volcanic cone. Multiple eruptions resulted in said cone growing into the 12,000-foot-tall volcano.

What happened to the volcano? How did the Ossipee Caldera come to be afterwards?

The YouTube video goes on to say that as pressure built, a massive eruption caused parts of the volcano's eruption column to collapse before the ground followed suit. Thus, the caldera was born. The outer rocks eroded away over time, which is why the caldera looks the way it does today.

As for the hot spot that caused all of this? Well, it's still active, but has since moved away from North America.

Check out the video below to learn more about the Ossipee Caldera.

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