What is "plastiglomerate"

n. (context geology English) a type of rock with plastic inclusions

Plastiglomerate is a term that was proposed by Patricia Corcoran, Charles Moore and Kelly Jazvac for a stone that contains mixtures of sedimentary grains, and other natural debris (e.g. shells, wood) that is held together by hardened molten plastic. It has been considered a potential marker of the Anthropocene, an informal epoch of the Quaternary proposed by some social scientists, environmentalists, and geologists.