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Sinkhole Exploration – Extras

http://news.nationalgeographic.com/news/2010/06/100603-science-guatemala-sinkhole-2010-humans-caused/

Giant human-made sinkhole in Guatemala.

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The Limestone/Sugar Cube activity mentioned above in more detail in PDF form:

http://www.watersheds.org/tuac/karst_groundwater.pdf

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Map of Pennsylvania showing just the areas with carbonate in black.

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More detailed geologic map of Pennsylvania in which the pink and orange colors represent areas with limestone.

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Pictures showing the difference in flooding after a rain in an area prone to sinkholes.

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A sinkhole filled with trash. Imagine all of this getting into your water supply!

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Another sinkhole filled with trash.

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