I though someone said that was a misquote from Marson. I suppose you could PM him on Fb or cdf (marsonk) if you want to get it firsthand.
Its just a piece of the puzzle. If it was a mis-quote, then thats probably why no one has mentioned it lately. I don't think I'll pm him.
Another question though:
I often dive a sinkhole which is part of a known(inaccessible) cave system. The outflow is reported at 3000gpm. Barring big crowds, it usually crystal clear, but there are days when the water gets milky. We have always thought that was from slides or collapses in the system.
So here's the question:
If Ben were caught in a big enough slide to completely bury him, wouldn't the Vortex basin have been silty/cloudy the next day? If the water was clear, could we eliminate the idea that he was buried in a slide?