Sinkhole formation refers to geologically governed processes that create closed depressions in the Earth’s surface, primarily in soluble rock terrains such as limestone, dolomite, or gypsum (karst environments). It occurs via subsurface dissolution of bedrock by percolating groundwater, leading to void development and progressive loss of structural support for overlying materials. Mechanisms include cover-subsidence (gradual settling of unconsolidated overburden into cavities) and cover-collapse (abrupt failure of cohesive overburden when cavity roofs exceed strength thresholds). Sinkhole formation is controlled by lithology, fracture and bedding networks, hydraulic gradients, recharge dynamics, and anthropogenic perturbations to groundwater levels or loading.
Every year at Grand Canyon National Park, millions of visitors from all over the world stop at one of a dozen water spigots. Most people are on a rim, seeing the canyon's majesty for the first time, when they step off the ...
Earth Sciences
Feb 5, 2026
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In early January, a giant sinkhole formed at an intersection in the West Oak Lane neighborhood of North Philadelphia after a water main break. Just two weeks earlier, the city reopened a section of the Schuylkill River Trail ...
Earth Sciences
Jan 20, 2026
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You trust the road beneath your tires. But what if that trust is misplaced? Sinkholes are increasingly turning ordinary streets into danger zones. And the cost of ignoring them is skyrocketing.
Environment
Dec 15, 2025
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25
Simple fiber-optic cables that are essential for powering the internet can be a useful tool in spotting geohazards such as sinkholes, according to a new study led by researchers at Penn State.
Earth Sciences
Sep 29, 2025
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30
In its latest postcard from Mars, the European Space Agency's Mars Express returns to Acheron Fossae: a dramatic network of chasms carved into the surface of the red planet.
Planetary Sciences
Aug 6, 2025
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