Petrifaction of Wood, Silicification

[Richard Eldon BARBER]

Wood submerged in mineral hot springs will undergo silicification in as
little as 7 years.  This is because silica monomers attach to the
surface of the wood, which is eventually is a coating of silicic acid. 
This when dehydrated becomes silica gel, which then begins to encase
itself within the cellular structure.   The wood can glassify in 7-36
years, as reported in the journal Sedimentary Geology.  
Petrifaction to quartz takes tens of millions of years.  So wood in a
piano would not petrify.  It could glassify.  
Is it reasonable that glassification would occur over 100 years of
being coated in dust/ash and wide swings in humidity to an extent which
would affect the woods vibrational/resonant modes.
Also why wouldnt the soundboard finish be absorbed over time into the
porous spruce type woods?