GEOLOGY

Detailed explanation-1: -The combination of gravity, loss of buoyancy and water pressure can activate a collapse. By keeping water tables high, water conservation rules and drought restrictions are tools to help prevent sinkholes from occurring.

Detailed explanation-2: -Some sinkholes result from the removal of a soluble rock such as chalk, gypsum or limestone. These are called solution sinkholes. These rocks dissolve when attacked by rainfall or groundwater that is acidic.

Detailed explanation-3: -According to the U.S. Geological Survey, there are three common types of sinkholes: 1) dissolution, 2) cover-collapse, and 3) cover-subsidence.

Detailed explanation-4: -A sinkhole is a depression in the ground that has no natural external surface drainage. Basically, this means that when it rains, all of the water stays inside the sinkhole and typically drains into the subsurface.