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Interesting, thanks for the context. I don’t know anything about asphalt, but if it didn’t cause any health or safety issues I’d place it on the innovation end of the spectrum. I’d be interested in things like how the spent diesel fuel was disposed of and if any petro chems would leach into stormwater from asphalt made this way.
Clay is read horizontally left to right, sand is read diagonally bottom right to top left, and silt is read diagonally top right to bottom left. So, the center of the mozzarella zone would be about 20% clay, 40% sand, and 40% silt.