And we're talking like 500 million years way back, right?

Y- yeah, yeah.

And back then, it was known as the Cambrian Period.

Um, Wisconsin, what's now Wisconsin, was actually located south of the equator before all those land masses broke apart into what we have today, and it was just off the coast of a slab that was called Laurentia.

And back then, the land that would become Wisconsin was covered by a shallow tropical inland sea that deposited thick layers of sand and mud on the ocean floor.

And then about 440 million years ago, there were all sorts of small aquatic animals and plants that deposited, that were deposited when they die on the ocean floor.

And over time, all these little creatures, plus the sand and the mud, were buried and compressed into what they call Late Cambrian sandstone, which is the geology that underlies the Central Sand Plains.

Mm