Like most people, you have very likely heard the word limestone. We use the word frequently in Windows Through Time. But do you really know what a limestone is? If you saw one, could you identify it?
FOLLY BEACH — The teardrop-shaped oyster shell didn't look like the others shells on the beach. The concrete-like limestone encrusting it was at least 3 million years old. Ashby Gale realized the ...
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