Fallen lands is a regional term used in the Brazilian Amazon to designate the landslides that occur on the banks of the Amazon River and its tributaries.
It is a natural phenomenon that can occur on a small scale or on a kilometric scale.
It is, without a doubt, the main transforming agent of the riverside landscape and responsible for a series of inconveniences for residents of isolated communities, towns, villages and cities located on its banks.

Source: Amazon Agency