Our accumulative activities have even produced a new type of rock called ‘plastiglomerate’ – a hard coagulate that contains sand grain, shells, wood and seaweed, all held together by molten plastic produced by the human burning of beach rubbish on campfires. Plastiglomerate was first identified by geologists on Kamilo Beach in Hawaii; it has been proposed – due to its durability and distinctive composition – as a plausible future Anthropocene strata horizon marker.
