OK, let me get this straight.
You say the following:
"The paper identifies four types of plastiglomerate, namely: "
Then, promptly contributes *precisely* three types.
Then spouts off nonsense.
Then ignores geologic weathering effects.
Screw it, ignores frigging reality.
Spanks for nothing.
Reality, plastic is an environmental problem, be it "harmless" or a cancer causing agent.
But, that isn't the topic of your alarmist bullshit.
So, with no due respect, SOD OFF!
I'm seriously and honestly reconsidering my subscription and network filter rules, after many years.