The quoted wikipedia "definition" is a bit crass, yet classical, as it misses completely the importance of soil life. No soil life, no soil!

Added a better quote from Bardgett's book.

The wikipedia quote talking of rock weathering as if it were a purely physical process also needs some improvement. Wrrrr, the wikipedia stuff sounds like 19th century.

But I've run out of time for the next days.

P.S. I should go sleep, yet couldn't resist to also mention Charles Darwin's last book on worms.