[Rockhounds] N.J. has a volcano. Seriously! Here’s what you need to know.

[Kreigh Tomaszewski]

It looks like just another hill in Sussex County, but you wouldn’t have
wanted to have been standing there 420 million years ago.

That’s about when the Beemerville Volcano erupted in Wantage, give or take
six million years, according to geologists.

So much about New Jersey is familiar — the Jersey Shore, traffic jug
handles, diners. Far less known is there was a time, nearly 200 million
years before dinosaurs first roamed the Earth, when a volcanic eruption
reshaped the landscape.

“You don’t typically think of New Jersey as volcanoes. We’re not Iceland,
we’re not Hawaii. But we do have a very unique geologic history,” said
Steve Domber, New Jersey’s state geologist.

The crater is long gone. All that remains of the Beemerville Volcano is a
volcanic neck that stretches 1,020 feet into the sky. It is largely covered
by trees, but there are several homes.

https://www.nj.com/sussex-county/2024/10/nj-has-a-volcano-seriously-heres-what-you-need-to-know.html