Morta is semi-fossilized wood. It is created when large trees are felled or overturned by geologic activity and become buried in an oxygen-limited fashion, usually in peat or clay. The wood is unable to rot normally so it begins the long process of fossilizing into stone. Morta is a generic term used to describe any semi-fossilized wood of this style.
Morta is found in various locations across the globe, usually in marshlands or moors. It is occasionally used in making tobacco pipes.
The term Morta is also related to the Roman conception of the Fates Moirae.