has part derives from surrounded by surrounded by air water ice ice mass water ice core 2019-01-17T16:38:41Z The composition of an ice core can be used to reconstruct past climates and climate change; typically removed from an ice sheet (Antarctica and Greenland) or from high mountain glaciers elsewhere. TODO: add axiom to show this is the output of a "sampling process" An ice mass which has been drilled from an accumulation of snow and ice that has built up over many years and that has recrystallized and has trapped air bubbles from previous time periods. ice sample ice core http://sweetontology.net/realmCryo/IceCore