U.S. Geography

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

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Which state is the furthest south?
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Which Washington state volcano erupted in 1980?
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How long is the road around Crater Lake in Oregon?
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What territory, created in 1861, comprised the Dakotas and parts of Wyoming and Montana?
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Which city is located on the Trinity River?
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What are the state bird and state tree of Nevada?
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Who were the first inhabitants of Montana?
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What is the name of the church that Martin Luther King preached at in Atlanta?
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