Transcript
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Member Week is here at Lowe's. Don't miss your chance to get up to 40% off hundreds of items like paint, outdoor and home essentials and more.
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Narrator (2:06)
Imagine for a moment that it's 50 million years ago. The Earth is incredibly hot, about 25 degrees hotter on average. There are gators in Canada. The Gulf of Mexico is the stuff of present day nightmares. It swallows the bottom halves of Mississippi and Alabama and the whole state of Florida. The Mississippi river is not yet an old man, but it's flowing. It's at the mouth of this river that the trouble begins. Because as the river flows, a fine layer of blue black silt begins to settle around the delta. And this isn't just any silt. It's mineral, heavy. The decay of everything the river has held over the millennia. The river will get faster and change course. This layer of silt will Move with it, fanning out along the shallow waters of this ancient sea. After another 20 million years or so, it'll become a layer of clay 400ft deep in some parts. And it's right on top of this thickest part of the clay that one day Mississippi will decide to build its capital city. This is, to put it mildly, a terrible decision, because this clay is a burnt orange monster. It's made of a mineral called smectite, so absorbent it can swell to 200 times its size when wet and shrink just that much when it's dry. Over the next 200 years, it'll swallow roads and send homes tumbling into creeks, cracked pipes and concrete foundations, and even bones. It's called Yazoo clay, and it's where our story begins. I'm Larison Campbell, and this is under Yazoo clay. As it happens, I am intimately familiar with this clay because Jackson, Mississippi, that poorly placed capital city, is where I used to live. This shifting, swelling soil has completely shaped the character of the place and everyone who lives there. Residents are used to broken water mains and boil water notices and seeing trees and utility poles toppled over in their neighbors yards. But there's an upside to this chaos. In a place as fractured as Mississippi, complaining about Yazoo clay is kind of the one thing everyone can agree on. It's like traffic in Los Angeles or the weather in New England. So when my producer and I found ourselves at a fancy Jackson art opening talking about dirt, I wasn't too surprised. It is the strangest, most destructive soil I've ever dug in before. Still, I never heard it talked about quite like this.
