My, Dr. Bill, that's very interesting. Never heard of such a word. Thanks for the webpage. I was hoping to get into the 'speleogenisis' thing (at some point), and I guess this comes close (at least we're going under ground here). Fascinating....I have a poem about the 'aquaduct of the mind.....' that came out as I thought about those ancient waterways and the way it reminds me of following the currents of someone's thoughts. This takes a whole new direction, deep under the desert sands...