This sequence of events would explain why any volcanic rocks that have erupted onto the surface in the past few billion years should still be unweathered and pristine.
这一连串事件可以解释，为什么过去数十亿年来，所有喷发到地表的火成岩仍然原始而未风化。
Beitai basin is a trapped syncline with its sedimentary sequence composed of volcanic sedimentary facies.
北台盆地为宽缓的向斜，盆地沉积充填序列为火山沉积序列。
A whirlwind computer animation sequence gives you a ride through the center of the earth to see the process of the geological forces that cause a volcanic eruption of earthquake.
本片还利用电脑动画模拟地心活动，向你展示导致火山喷发和地震的地底力量的形成过程。
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