What on Earth? -- Holes in the ground -- The big truth - sinkholes in the Dead Sea -- Natural and unnatural causes -- Amazing sinkholes around the world -- Is it possible to predict sinkholes?.
Summary:
"Learn all about sinkholes, from how they are formed to how they can affect people around the world"-- Provided by publisher.
This resource is supported by the Institute of Museum and Library Services under the provisions of the Library Services and Technology Act as administered by State Library of Iowa.