Earth
What is the name given to a fossil that best defines a rock layer's age?
More Questions from Earth
What is the name of the limestone formation that rises from a cave floor?
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What type of scientist studies microscopic plants and animals?
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How long does it take for the Earth to rotate around completely on its axis?
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What is the highest mountain, considering just the contiguous United States?
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What type of clouds are thick and puffy and can sometimes turn into thunderstorms?
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