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Sinkholes are natural depressions in the land caused when limestone and soils dissolve. They form when groundwater removes rock underground. They can form by slow gradual sinking or by sudden collapse of an underlying hole. Sinkholes are common in about one quarter of the U.S. You can usually...
Grade Level   6 7 8 9 10
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2
Scientists, engineers, and others create geologic maps to determine the best places for people to settle, build, farm, and use land in a variety of ways. They also use geologic maps to monitor the ways that human activity might be changing the land itself over time. As the Geologic Map of Karst in...
Grade Level   6 7 8 9 10 11 12
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3
The goals of NCKRI are to conduct, support, facilitate, and promote programs in cave and karst research, education, environmental management, and data acquisition and sharing.
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4
Our mission is to improve the fundamental understanding of karst water systems.
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5
The National Speleological Society does more than any other organization to study, explore, and conserve cave and karst resources; protect access to caves; encourage responsible management of caves and their unique environments; and promote responsible caving.
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