Mantua Township is like a lot of South Jersey—15,000 people, the look of sleepy crossroads village combined with the chain stores and restaurants of a typical American suburb. One seemingly unremarkable spot in Mantua Township is a Lowe’s hardware store on Woodbury Glassboro Road. But it hides something extraordinary. Out back, there’s a an old quarry that’s now a giant mud pit. Descending into it, every step takes you back in time 400,000 years. All around are the lines in rock, called striations, that mark phases in geologic history. And…
