The fact that volcanic rock has often been found early in the rock record but less frequently in later rock layers suggest to scientists the following conclusion about early earth: <span>volcanic activity was more common in the past than it is today.
</span>Besides volcanic activity in general, also huge volcanic eruptions<span> were much </span>more common than today<span>.</span>
Answer:
Kansas: Midwest
Colorado: Southwest
Missouri: Midwest
Oklahoma: Southwest
Illinois: Midwest
Iowa: Midwest
Arizona: Southwest
Explanation:
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