Haddington Island (British Columbia)

Haddington Island (British Columbia)

Haddington Island is a small volcanic island in the Canadian province of British Columbia, located south of Malcolm Island and Broughton Strait. It is located in the Mount Waddington Regional District.

The closest major community to Haddington Island is Port Hardy. [http://www.bcminerals.ca/files/bc_industrial_mineral_operations/000240.php Mineral Resources Education Program of BC] ]

Geology

Haddington Island is a member in the chain of volcanic peaks that run from Brooks Peninsula northeastward across Vancouver Island to Port McNeill called the Alert Bay Volcanic Belt. The existence of felsite and andesite at Haddington Island suggests it might have formed 3.7 million years ago as the Juan de Fuca and Explorer Plate to its west have been subducting under the North American Plate at the Cascadia subduction zone. As the ocean crust of the Juan de Fuca and the Explorer Plate melts, it creates magma that penetrates the crust, causing periodic eruptions of the volcanoes. The western end of the Alert Bay Volcanic Belt is now approximately Unit km|80|0 northeast of the Nootka Fault, which separates the Explorer and Juan de Fuca plates. However, at the time of its formation Haddington Island may have been coincident with the subducted plate boundary. Also, the timing of volcanism corresponds to shifts of plate motion and changes in the locus of volcanism along the Pemberton and Garibaldi volcanic fronts. This brief interval of plate motion adjustment approximately 3.5 million years ago may have triggered the generation of basaltic magma along the descending plate edge.cite book|last=Wood | first=Charles A. | coauthors=Kienle, Jürgen| chapter= | pages= | title=Volcanoes of North America: United States and Canada | year=2001 | edition= | publisher=Cambridge University Press | location=Cambridge, England| isbn= 9780521438117|oclc= 27910629]

The grey to bluff andesite on Haddington Island is considered by many to be British Columbia's finest building stone because it is easily profiled and carved. Some of British Columbia's landmark buildings were faced with Haddington Island andesite: the Vancouver Hotel and the British Columbia Parliament Buildings in Victoria. [ [http://www.bedrockgranitesales.com/products.html Natural Landscape Stones - Bedrock Granite Sales, Andesite, Basalt, Rhyolite, Sandstone - Vancouver, BC, Canada] ]

References


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