> As they are slowly buried by sedimentation, the damaged leaf sheaths form stiff fibres that intertwine into a ball, collecting plastic in the process. I thou

> As they are slowly buried by sedimentation, the damaged leaf sheaths form stiff fibres that intertwine into a ball, collecting plastic in the process. I thought this was due to being rolled around by currents and waves, rather than sedimentation. Or is that the same thing?