'Rocks' in the Bible

And lo, the veil of the temple was rent in two from the top to the bottom, and the earth was shaken, and the rocks were rent,

And the kings of the earth, and the great, and the chiliarchs, and the rich, and the strong, and every bondman and freeman, hid themselves in the caves and in the rocks of the mountains;

and they say to the mountains and to the rocks, Fall on us, and have us hidden from the face of him that sits upon the throne, and from the wrath of the Lamb;