My Flickr Photos of Springs

Tuesday, May 26, 2009

Getting "that sinking feeling" in Pasco County

Published 5/25/09
Sinkholes can be found around the world, but because of Florida's unique subsurface structure of limestone, mineral deposits and flowing water underground, Florida has the highest amount of sinkholes in the U.S.

The limestone layer beneath the surface here in Florda is porous, allowing water to move through it. Occasionally, that flow of water runs into confining layers of mineral deposits such as sand, silt or clay that can clog the pores of the limestone. This causes a winding pattern of underground water flow. This flow of water gradually erodes parts of the limestone creating cavities or caves underground. Those cavities typically fill up with water which helps to support the weight of the walls and the ceiling of the cavities, or the ground we walk on.

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