sandstone texture

abstract arenite art australia australian background beige circles closeup color colors colour colours cycles detail details erosion freestone geological grains hard hue hued layer layering natural nature ocher ochery ochre ochry pattern period quar rock sand sandstone sedimentary smooth stone strata striation structural structure structured structures sunbaked surface sydney tan texture textures tone tones topview triassic upper veins wallpaper warm washed washed-out yellowish-brown soft gentle geometric shape