"Sediment samples" refers to small portions of solid material that have settled at the bottom of a body of water or accumulated on the Earth's surface. Full definition
The agency has begun analyzing about 1,800 sediment samples from the river, which were taken by the state. (spectrumlocalnews.com)
Even sediment samples that were stored at room temperature for years still yielded DNA. (sciencedaily.com)
The scientist collected twenty - four sediment samples from these rivers — and then applied an innovative technique to make their measurements. (sciencedaily.com)