The immense weight of infrastructure compresses underlying sediments, while natural geological processes continue to reshape the landscape thousands of years after the last Ice Age.
The Legacy of Ancient Glaciers
One of the lesser-known contributors to New York’s sinking lies deep in the region’s geological history.
Approximately 20,000 years ago, massive glaciers covered large portions of North America.
The tremendous weight of these ice sheets compressed the Earth’s crust beneath them.
When the glaciers eventually melted, the land began a slow process of readjustment known as glacial isostatic adjustment.
Some regions continue rising today as they rebound from the ancient ice burden.
Others, including parts of the northeastern United States, are slowly sinking as the crust shifts in response to these long-term geological forces.
Scientists believe this process contributes significantly to subsidence throughout the New York metropolitan region.
Not All Neighborhoods Are Created Equal
The rate at which land sinks varies considerably across New York City.
Neighborhoods built directly on solid bedrock tend to be more stable.
However, areas constructed on softer materials face greater challenges.
Large portions of the city were developed on:
