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>
The answer is C
I hope that helps you
Natural: Grand Canyon.
Man made: London bridge
I don't understand the question are there answer choices
That is called an obtuse angle.
