It is horrible and not at all of decomposition but of fecal waste maybe sweetened slightly, thick in the air like you are exhuming something dangerous, which perhaps you are. Soon after the smell, the streaks of brown darken and the ice turns with entrails and smashed pieces of shell, the shovel uncovering squid tentacles, crab antennae, all two months old, rotten, buried under there, each scrape revealing some new purple color, and the odor is such that you really cannot breathe it long.
