A vocabulary of landscape — a landscape of words 975 entries

paleocrystic ice

pay-lee-oh-KRIS-tik
Very old, formidable polar pack ice — ice that has survived many years of melt and refreeze, compressed and hardened into formations up to fifty feet thick. The word sounds ancient because the ice is ancient.
Etymology
Greek: palaios (old, ancient) + krystallos (ice, crystal).