Bog-wood, also known as
morta is wood from trees that have been buried in
peat bogs and preserved from
decay by the
acidic and
anaerobic bog conditions, sometimes for hundreds or even thousands of years. The wood is usually stained brown by
tannins dissolved in the acidic water. Bog-wood represents the early stages in the
fossilisation of wood, with further stages ultimately forming
lignite and
coal over a period of many millions of years. Bog-wood may come from any tree species naturally growing near or in bogs, including
oak (
Quercus –
bog oak), pine (
Pinus),
yew (
Taxus), swamp cypress (
Taxodium) and kauri (
Agathis). Bog-wood is often removed from fields etc. and placed in
clearance cairns.
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