sentence: Someone stepping in it starts to sink.
sentences_after: Around the person dense regions of sand and sediment form and grip the person. The viscosity of the quicksand seems to increase suddenly. It is now a gel. In order to move within the quicksand, a person or object must apply sufficient pressure on the compacted sand to re-introduce enough water to liquify it.
concept_name: Someone
headings: Quicksand Properties
categories: Geography