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August 18, 2006, Newsletter Issue #103: Caves

1

Tip of the Week

How do caves form? When groundwater moves through cracks and fissures in a carbonate rock (usually limestone) it dissolves it, bit by bit. Over time the crack enlarges to become an underwater cave. If the water table is lowered, or the land uplifted a bit, the underwater cave might be above water and accessible to us.



2

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