austere bare bleak canada cold dawn debris glacier hard ice landscape mountains natural nature peak retreat rock Rockies rocky Rocky Mountains scraped scratched scree sky snow stern summit sunrise worn abstract angles appearance background beach coast coastline color colour cracks crannies grained grainy heavy holes hollows layers levels limestone ocean rocks rough sand sandy sea seashore seaside shade shadows shapes shore Sizes solid stones stony strength strong surface surfaces surfacing texture textured textures uneven variations variety brown colored coloring colors coloured colouring colours conglomerate contours contrast contrasts heap heaped layered light lines pile piled rock-face rockface rugged shape shaped stone strata stratum sunlight sunny sunshine wallpaper Australia blocks bush clearing dried-leaves edges fissures flaws geological grass greenery ground large shrubbery split vegetation