'Rocks' in the Bible

And they shall go into the holes of the rocks, and into the caves of the earth, for fear of the LORD, and for the glory of his majesty, when he ariseth to shake terribly the earth.

To go into the clefts of the rocks, and into the tops of the ragged rocks, for fear of the LORD, and for the glory of his majesty, when he ariseth to shake terribly the earth.

And they shall come, and shall rest all of them in the desolate valleys, and in the holes of the rocks, and upon all thorns, and upon all bushes.

He shall dwell on high: his place of defence shall be the munitions of rocks: bread shall be given him; his waters shall be sure.

Enflaming yourselves with idols under every green tree, slaying the children in the valleys under the clifts of the rocks?