sediment

But in the sediment core, the amount of charcoal debris—an indicator of fire burning nearby plants—more than doubled earlier than that time, starting about 41,600 years ago.

To remedy that problem, he and his collaborators developed a process for filtering intact cells out of a mixture, leaving behind eDNA genetic fragments left from dead cells in the sediment.

But the dinosaur, encased in layers of sediment, is exempt from this endless cycle of growth and decay.

Be sure to strain liquor for bits of sediment.

They also relied on panning - the washing of sediment through a sieve so the gold settles at the bottom.