camphor tree block

abstract age aged bark block brown camphor chapped chestnut circle circles circular circulation close closeup corkscrew crack cracked crackle cross cut cycle cycling dehisce detail dissilient dry fission flaw for grain gyroidal helical helix lap linger log loop maroon natural nature old pattern patterns plants rend ring rings round rupture section sever shape spall spiral spiry split surface texture timber transverse tree trees trunk unique veins wood wooden xiang xiangzhang zhang