Pollens are best preserved in arid zones,particularly loess or sandy sedimentary deposits.

Name: Pollens are best preserved in arid zones,particularly loess or sandy sedimentary deposits.
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Pollen is best preserved in environments that are either consistently wet or anoxic (lacking oxygen), such as peat bogs, lake sediments, and some types of marine sediments, because these conditions inhibit the activity of bacteria and fungi that would otherwise decompose the pollen grains.

Pollens Are Best Preserved in Arid Zones,particularly Loess or Sandy