plastic rocks

(Newser) - Humans have made their mark on the geological record with plastiglomerates—"rocks" formed from a mix of natural debris and plastic, fused together with heat. These rocks were first described in Hawaii almost a decade ago, but they've been seen in far-flung places since then, including a remote...

(Newser) - Since the mid-1950s, humans have produced more than 6 billion tons of plastic—and at least in Hawaii, geologists are finding that some of it is now fusing to volcanic rocks, seashells, sand, and coral to form an entirely new type of rock. Calling them plastiglomerates, the geologists say they...