Taiga Shield

The Taiga Shield lies on either sides of the Hudson Bay. The eastern segment lays hold to the more central region of Quebec and the majority of Newfoundland and Labrador. The western segment of the Taiga Shield contains northern Manitoba and Saskatchewan, a portion of southern Nunavut and the more south-central region of the Northwest Territories. The main cities that are located in the Taiga Shield are Yellowknife, Uranium City and Happy Valley-Goose Bay. The total population of the Taiga Shield is 38,116.

Landforms



Four billion years ago the Taiga Shield was formed with the rest of the Canadian Shield. The mountains of the Taiga Shield were formed as a result of folding. After time began to pass they eventually started to erode. Now the Taiga Shield is mainly composed of plains and hills.



Rock Types


As the Taiga Shield is part of the Canadian Shield, the bedrock that underlies it is extremely old. Most settled areas in the Taiga Shield are developed around mining and hydroelectric activity, an example is Uranium City. Mineral extraction is the one of the most important economic activity in this ecozone. Some of the minerals that are mined in this area are:
-Iron
-Uranium
-Gold
-Diamonds



Vegetation and Soil


The main vegetation in the Taiga Shield is trees. Mainly throughout this ecozone the plains are covered by forests. Some of the trees found throughout the Taiga Shield are:
-Black spruce
-Jack pine
-paper birch
-trembling aspen
The soils found in this ecozone are typically very thin, highly leached soils. Although lots of the Taiga Shield is covered by bare rock.



Climate


The Taiga Shields air mass is subarctic continental. The precipitation is very low throughout the majority of this ecozone (from 175 mm to 200 mm) but as you head more towards the eastern seaboard there tends to be larger amounts of precipitation (1000 mm). The Taiga Shield typically has short summers with cold and long days while the winters are typically very long and with long nights.Yellowknife-Climograph.jpg



Fun Facts
· The Taiga Shield contains some of the oldest rocks in the entire world.
· The winters in this ecozone can last up to six months long.
· The worlds oldest trees are the bristlecone pines. There is one of these located in the Taiga Shield that is 4600 years old.
Questions
1. When was the Taiga Shield formed? 4 billion years ago.
2. What air mass is the Taiga Shield? Subartic continental
3. The Taiga Shields precipitation tends to increase as you head towards the eastern coast. True or False? True.
4. Does the Taiga Shield have shorter summers or winters? Summers.
5. Was the Taiga Shield formed by folding or faulting? Folding.

Bibliography


http://en.wikipedia.org/wiki/Taiga_Shield
Clark, Bruce. Making Connections Canada's Geography. Toronto: Pearson Education, 2006.
http://ecosys.cfl.scf.rncan.gc.ca/images/thumb_ecoz10.gif http://www.enr.gov.nt.ca/_live/images/rad/Taiga_Shield_mid_boreal.JPG