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The Geological History of British Columbia. Geology of Canada.

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Presentation on theme: "The Geological History of British Columbia. Geology of Canada."— Presentation transcript:

1 The Geological History of British Columbia

2 Geology of Canada

3 Tectonic belts of British Columbia and Yukon

4 Terrane boundaries

5 Possible locations of various Cordilleran terranes during the Permian (ie. prior to 250 m.y.)

6 Geological history of British Columbia A passive ocean-continent margin existed from around 700 m.y to around 200 m.y.

7 Geological history of British Columbia Subduction of oceanic plate beneath North America. Approach of micro-continents from the southwest.

8 Geological history of British Columbia Accretion of the Intermontane Super- Terrane and consequent thrusting and folding of existing sedimentary rocks into the Rocky Mountains. Approach of more micro-continents. Subduction related volcanism and intrusive bodies.

9 Rocky Mountains Frank Slide

10 Rocky Mountains Burgess Shale

11 Rocky Mountains Takkakaw Falls

12 Geological history of British Columbia Formation of the Coast Range Plutonic Complex. Accretion of the Insular Super Terrane. Ongoing subduction of the Juan de Fuca Plate beneath B.C., Washington and Oregon. Further uplift of the Rocky Mountains.

13 Coast Range Plutonic Complex

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16 Extent of ice cover at the height of the last glacial advance (ca. 14,500 years b.p.)

17 Glacial till exposed at Malaspina University College

18 Glacio- fluvial deposits in Cedar Glacial striae

19 Present-day plate distribution along the western coast of the US and Canada

20 Volcanism in BC


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