U.S. Geography

What rock was adopted as Missouri's official state rock in 1967?

More Questions from U.S. Geography
Geologically speaking, what are the Hawaiian islands?
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Which U.S. state is known as the "Sugar State" or "Pelican State"?
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What state is the town of Santa Claus in?
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The name Texas is from an Indian word meaning what?
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Which of these cities has a hot desert climate?
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What famous building is located at 210 South Canal Street in Chicago?
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The Lincoln Park Zoo is the oldest public zoo in America; what year was it founded?
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What is the third largest city in population in Minnesota?
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