Groundwater Dissolution

Groundwater also reacts chemically with the surrounding rocks; it may deposit minerals and cement together grains, causing a reduction in porosity and permeability, or form features like stalagtites and stalagmites in caves. In other cases, particularly when acidic water moves through limestone, it can dissolve the rock, forming caves and underground tunnels. sinkholes form where these dissolution cavities intersect the surface of the Earth.

Groundwater dissolution leads to the development of a distinctive class of landforms called karst terranes where caves can collapse, leaving sinkholes and valleys on the surfaces, and eventually evolve into spectacular towers and pinnacles of nondissolved rock surrounded by the former cave passageways. South China is famous for highly evolved karst ter-ranes, whereas parts of the U.S. Midwest are known for well-developed underground cave systems.

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The Basic Survival Guide

The Basic Survival Guide

Disasters: Why No ones Really 100 Safe. This is common knowledgethat disaster is everywhere. Its in the streets, its inside your campuses, and it can even be found inside your home. The question is not whether we are safe because no one is really THAT secure anymore but whether we can do something to lessen the odds of ever becoming a victim.

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