The remains of the last ice age are seen in the Canadian ArcticArchipelago in ice caps that occur on Baffin (Penny and Barns ice caps), Devon, Axel Heiberg (Franz Műller Ice Cap) and Ellesmere (Prince of Wales, Sydkapand and Agassiz and an unnamed ice cap).
The bedrock geology of the Canadian ArcticArchipelago consist largely of a metamorphic Precambrian bedrock composed of mainly granite and gneiss and of a lower Paleozoic sedimentary rock composed of a major calcium carbonate complex (Dyke 1984, Edlund and Alt, 1989).
Drawing on his experiences in Alaska, growing up in Greenland, and fieldwork in the ArcticArchipelago he stated that to the most northerly tribes (ones living in the Archipelago) the use of vegetable food is purely incidental and largely limited to the partly fermented and pre-digested content of the rumen of caribou and muskoxen.
The principal arms of the Arctic Ocean are the Beaufort, Chukchi, East Siberian, Laptev, Kara, Barents, and Greenland seas.
The Arctic Ocean's temperature and salinity vary seasonally as the ice cover melts and freezes; its salinity is the lowest on average of the five major seas, due to low evaporation, as well as limited outflow to the world ocean with heavy freshwater inflow.
The Arctic is a major source of very cold air that inevitably moves toward the equator, meeting with warmer air in the middle latitudes and causing rain and snow.