Ever see a geologist giggle?

Plastic is the new rock, say Geologists • The Register

"Geologists have identified what they say is a new class of rock.

"'Plastiglomerates', as the new rocks are called, form when plastic debris washes up on beaches, breaks down into small pieces, becomes mixed in sand or sticks to other rocks and solidifies into an agglomerate mixing all of the above. Such rocks, say US and Canadian boffins in a paper titled An anthropogenic marker horizon in the future rock record, have ‘great potential to form a marker horizon of human pollution, signalling the occurrence of the informal Anthropocene epoch.’"