Is it " a giant granite birthday cake, or a prison far too easy to escape" ?

是“一个巨大的花岗岩生日蛋糕吗，还是一个极易越狱的监狱”？

The floods were so powerful they carried giant granite boulders embedded in icebergs dropping them hundreds of kilometers from the mountains where they originated.

洪水的威力如此之大，以至于把嵌在冰山里巨大的花岗岩巨石带走，在距离它们原始位置几百公里的地方将它们扔下。