age-rings angles bark block brown chopping colored coloring colors coloured colouring colours crack cracked cracks cut cuts drying exposed firewood grooved grooves length lengths logs lopped orange perspectives rings rough sawn surface surfaces texture textures timber tree tree-block tree-rings trunk uneven wood wooden blocks pieces pile piled tree-blocks woodpile fossil old rock abstract layers lines nature age circles log oldness science felled floor forest twigs woodland branch limb annual rings live time lumber jack material old age raw material substance tree trunk wood texture woodgrain background dry free image organic photo stock annual grain rip trees trunks