Pollen, dust, charcoal, volcanic ash and chemicals suspended in the atmosphere fall into the lake and over time sink to the lakebed.
Particulates can come from natural sources or they can be artificially produced.
- Air quality – article about particulates suspended in the air
- Exploding Taupō – article about eruptions that sent out ash and pumice, which are used as evidence when dating sediment cores
- Ice ages unearthed – article about using pollen and volcanic ash to date sediment cores