Vancouver Island is part of the Insular Superterrane of western B. C


Download 600 b.
Sana09.07.2017
Hajmi600 b.


The Geology and Geological History of Vancouver Island Steven Earle, PhD Department of Geology Malaspina University-College Nanaimo, British Columbia, Canada


  • Vancouver Island is part of the Insular Superterrane of western B.C.







Myra Falls Mine





Karmutsen Formation (Triassic) sea-floor pillowed basalt Quatsino Formation limestone (with a mafic dyke).







Jurassic aged Island Intrusion granite with a quartz-feldspar vein













Nanaimo Group (Cretaceous) Sandstone, mudstone, comglomerate



The City of Nanaimo exists because of coal mining, which took place from around 1850 to 1950. It could be argued that this is also why British Columbia is part of Canada. The only coal mining at present is from the Quinsam mine near to Campbell River. Exploration for coal bed methane is currently underway in the area north of Nanaimo





Leech River Complex (Pacific Rim Terrane) phyllite at Niagara Falls



Crescent Terrane Tertiary, Metchosin Igneous Complex, Sea-floor pillowed basalt



These collisions led to compression of western North America and the up-thrusting of Nanaimo Group and Wrangellia rocks onto Vancouver Island





Cross-section from the edge of the North American plate at the subduction front, across Vancouver Island to the Strait of Georgia. This section shows the Pacific Rim Terrane in brown and the Crescent Terrane in red. Cretaceous and Tertiary sedimentary rocks are shown in yellow.




Do'stlaringiz bilan baham:


Ma'lumotlar bazasi mualliflik huquqi bilan himoyalangan ©fayllar.org 2017
ma'muriyatiga murojaat qiling