New Defender's Study Bible Notes
9:5 removeth the mountains. Job is here rehearsing some of the terrible effects of the great Flood. The pre-Flood mountains had been eroded away by the mighty waters, and deposited as sediments in the pre-Flood seas. These later were uplifted to form the post-Flood mountains, thus in effect “overturning them.” Many of the sediments so deposited, in the process of uplift, were still further deformed—tilted, faulted and folded—before they could harden into solid rock.