abstract
aging
background
bark
bright
build
circles
concentric
construction
cracked
cross
cut
dead
ecology
edge
firewood
fissure
forest
history
incision
industry
line
log
material
natural
nature
oak
package
paper
pattern
recycle
resources
rift
rigid
rough
sawmill
shape
shear
slice
split
striped
structure
stump
surface
texture
timber
tree
wood
wooden
years