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 ...

Most sinkholes form in “karst terrain,” areas where bedrock consists of water-soluble rocks like limestone, gypsum, or salt.

There are two categories of change that create sinkholes. One type is associated with carbonate rock. This is a type of rock ...

St. Louis has experienced several sinkholes over the past few months. St. Louis has experienced several sinkholes over the past few months. The Metropolitan Sewer District explains the difference ...

The sheer drop of the Sheeheet pit is ringed with slippery mud, prompting the authorities to put up a fence and signs as they seek to attact more visitors — - Shrouded in fog in the lush mountains of ...