The Canadian Shield by Taylor

So the canadian shield literally a wall of rocks. The end.

The Canadian Shield, or Laurentian Plateau, covers around half of Canada, a lot of Greenland and part of the United States. This covers about 4.4 million square kilometres. It is the oldest part of the North American crustal plate. The Canadian shield is composed of granite, igneous, and metamorphic rock. (Google)

The shield was the first part of the continent to be permanently raised above sea level. Movement, erosion, and continental ice sheets have created its present form. The invasion and withdrawal of the ice sheets, depressed the surface creating Hudson Bay, formed thousands of lakes, carried away most of the soil cover and set down glacial dirt. (Google)

The Canadian Shield is has lots of mineral ores, compared to other places in the world. It is filled with huge amounts of nickel, gold, silver, and copper. The shield is a big source of minerals like iron, nickel, copper, zinc, uranium, gold, silver, platinum and molybdenum. Throughout the Shield there are many mining towns that take these minerals out of the ground. The biggest, and one of the best known, is Sudbury, Ontario. Sudbury does not follow the normal process of forming minerals in the Canadian Shield since there is lots evidence that the Sudbury Basin is an old meteorite impact crater. The close, but less known Temagami Magnetic Anomaly has huge similarities to the Sudbury Basin. This shows it could be a second metal‐rich impact crater. (Google)

An interesting thing about the Canadian shield is that it involved and includes lake Manicougan. Lake Manicougan is a lake formed by a creator going the earth. The lake is in a perfectly connected circle. The circle can be seen from space.

“The geological term for shield is: Is a shield is generally a large area of high-grade metamorphic rocks that form tectonically stable areas. To form the shield, you need 570 million years to form. In some cases they have been up to 3.5 billion years old.” (Google)

“A craton is a stable mass of land that is the central mass of the contenant.  It’s used to distinguish regions from mobile geosynical troughs. The main cratons may consist of shields and platforms. In this case, the Canadian shield is a craton.” (Google)

A wetland is a swampy or wet area. It will have a smell to it and will of course be wet. One of Ontario’s wetlands is located on the Canadian shield. This wetland isn’t very well protected. There is a law permitting significant site alterations. And there are many people against it.

A boreal forest is a dry forest is like the Yukon interior dry forests.Another example is the forests along the ocean in Alaska.The Canaidian shield consists of some of these forests.

 Ps. I know what high-grade metamorphic means now. I also know what metamorphism means. I has to do with the minerals.  (Google)