Submerged wood has a real valid history. Pine trees were cut and submerged to allow the sap to be replace with water. This allowed the trees to cure without cracking and made for excellent masts for sailing ships.

Some of the best shingles on the east coast were cedar that fell in the swamps and sank. The trees were spudded out of the muck, cut into billots, and froed into shingles. Cedar is fairly rot resistant. This made it more so.

I can see it working (kinda) with tone woods.

Don