'Clefts' in the Bible

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.

All of them will come and settlein the steep ravines, in the clefts of the rocks,in all the thornbushes, and in all the water holes.

who burn with lust among the oaks,under every green tree,who slaughter children in the wadisbelow the clefts of the rocks?