Chicago sinkhole swallows three cars, injures one person [w/video]
Sinkholes typically form in areas with easily dissolved rocks underground, such as limestone. As groundwater erodes these rocks, voids form in the soil, and heavy rains can cause those voids to implode, bringing the surface down at the same time. The Jeffrey Manor neighborhood, where this sinkhole occurred, is just 15 miles from the Thornton Limestone Quarry in Thornton, IL. You can watch a local news report on the incident below for more information.
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