annual rings
archaeology
art
bark
blue sky
botany
building materials
cellulose
chronology
construction material
cracks
dating
dendrochronology
dendroecology
energy
fiber
flora
geoscience
green meadow
growth
juice
pile of wood
raw
resin
rings
root
root pile
science
structure
surface
teaching
texture
time
tree
tree age
tree bark
tree clusters
tree resin
tree sap
trees