GBU-57 reaches 200ft of soil and gravel. Not 200ft of 5000psi limestone typical of the Qom formation in that area of Iran.

That limestone probably much better transfers the seismic wave of the explosion though.

	▲	missedthecue 11 hours ago \| parent [-]
		The equipment in the facility isn't bolted into the limestone though. The facility is inside ultra high performance concrete and if the Iranian engineers had two braincells, dampening layers. They were building it for this moment after all.