"Boreholes—used to extract oil, natural gas, coal, metals and minerals—drive hundreds to thousands of meters into the Earth. Together, the millions of oil boreholes we’ve drilled span some fifty million kilometers, roughly the distance from Earth to Mars. It’s this “deep anthroturbation” that’s truly unprecedented in our planet’s history. And, most importantly to the geologists, this stuff’s permanent.
“The only way these marks can go away is by coming to the surface and being eroded, or getting caught up in a continental collision, or some other tectonic activity,” Zalasiewicz told me. “Any scenario for erasing them will take tens to hundreds of millions of years.”
Or you could just cut out to the paper that's being quoted.