How the disaster happened, geological evidence and some probable suppositions, and my rendering.
Step 1: TB mill out 1500+ psi between 2380 ft.-2480 ft. (Middle 2010) It is possible that a packer did not hold and high pressure waters also flowed into Oxy 3, over-powering the cavern’s 1,000 ft. bottom portion laying on Shale Sheath, fracturing it.
Step 2: Nascent Down thrown fault block damaged or a portion shatters due to mill out breaching the salt and shale sheath, setting off localized faults.
Step 3: Faults send seismic waves in all directions, damaging the shale sheath further, and forming a Disturbed Rock Column, (December 2010, when some seismic activity was first reported by residents)
Step 4: Bottom of Oxy 3 cavern laying upon the shale sheath fails and a geologic explosion occurs, creating the lower Disturbed Rock Column. Seismic waves intensify diverting methane to bubbling spots, until finally the two DRZ’s meet and on Aug. 3rd completed the connection, and the earth and rock gave way, thereby expressing the ‘Sinkhole’
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(Disclaimer: This is an account of surface and sub-surface geology as known at the time, and the records discovered at LDNR SONRIS, as well as the testimony in writing of Mark Cartwright, and all evidence discovered to date by Mr. Don Marlin…I did not have my head stuck down 5000 ft., so no one can actually say precisely what happened. This is just an aid to get your head to wrap around it.)