The use of fire for cooking and warmth is apparent due to the presence and common occurrence of large and small oil lamps along with charred griddle stones (which aided in heating and cooking food) on archaeological sites.West (2003) pp.70–86 Mammal oil was the fuel of choice due to the lack of a constant supply of wood on the Aleutian Islands. The Islands were treeless with the exemption of the farthest eastern end.
