Edziza obsidian is the most widely distributed obsidian in western North America and perhaps the most widely distributed obsidian in subarctic North America, occurring over an area of more than . It has been recovered from archaeological sites in
Alaska,
Yukon, western
Alberta and along the
British Columbia Coast, having been used by North American indigenous peoples to make
stone tools as early as 10,000 years ago. In Alaska, Edziza obsidian has been recovered from the 10,300-year soil layer level of the
On Your Knees Cave archaeological site on
Prince of Wales Island. A 4,100-year-old
Tlingit village site near
Coffman Cove dubbed 49-PET-067 also contains Edziza obsidian. In Alberta, flakes of Edziza obsidian have been found at
Patricia Lake near the town of
Jasper. In British Columbia, two fragments of Edziza obsidian have been recovered from the Bluejackets Creek archaeological site on
Haida Gwaii and are presumably of late
Holocene age. ==See also==