Funny, Ray!
The local tectonic engineers think it was a "wedge" of two rock plates
splitting, exacerbated by the New Guinea-like rains we have had here all season.
Not the first big slide on that stretch of "the I-40". The top of the slide is hundreds of feet up the mtn side, with no roads to get to the summit
to start the remediation work.
Brian, it is somewhat analogous to a slide on I-684, shutting it down for 3-4 months...
Quick pic from the Asheville Citizens-Times...those are house sized boulders.
Happened at Mile Marker 3 near the western edge of NC and eastern TN border.
A fineazz piece of interstate, imo.
BR,mD