The shield is largely devoid of soil and dotted by hundreds of thousands of swamps, lakes, rivers, and streams.

The Flin Flon greenstone belt in central Manitoba and east-central Saskatchewan "is one of the largest Paleoproterozoic volcanic-hosted massive sulfide (VMS) districts in the world, containing 27 copper-zinc-(gold) deposits from which more than 183 million tonnes of sulfide have been mined."[17].

[14] In the case of polar bears (Ursus maritimus), the Shield area contains many of their denning locations, such as the Wapusk National Park. These soils are mainly spodosols, associated with evergreen forest, while the northern TUNDRA soils are heavily moisture laden and frozen for much of the year. [15], The Canadian Shield is one of the world's richest areas in terms of mineral ores.

Today it consists largely of an area of low relief 300–610 m (980–2,000 ft) above sea level with a few monadnocks and low mountain ranges (including and Laurentian Mountains) probably eroded from the plateau during the Cenozoic Era. Hydrologic drainage is generally poor, the soil compacting effects of glaciation being one of the many causes. Peterson Field Guide to Geology of Eastern North America by Roberts, David & Roger Tory Peterson. During the Pleistocene Epoch (2.6 million to 11,700 years ago), the vast continental glaciers that covered northern North America had this region as a centre. [3] With a deep, common, joined bedrock region in eastern and central Canada, the Shield stretches north from the Great Lakes to the Arctic Ocean, covering over half of Canada and most of Greenland; it also extends south into the northern reaches of the United States. [9] The multitude of rivers and lakes in the entire region is caused by the watersheds of the area being so young and in a state of sorting themselves out with the added effect of post-glacial rebound. Coordinates: 52°00′N 71°00′W / 52.000°N 71.000°W / 52.000; -71.000, Geographic and geologic area of North America. Corrections? Start over. D. contains excellent soils Question 14 of 25 Question 14 of 25

[citation needed] It has over 150 volcanic belts (now deformed and eroded down to nearly flat plains) whose bedrock ranges from 600 to 1,200 million years old. Glaciation has left the area only a thin layer of soil, through which the composition of igneous rock resulting from long volcanic history is frequently visible. The shield holds great hydroelectric potential, especially along its southern edge where local relief is most abrupt. The kimberlite pipes in which the diamonds are found are closely associated with cratons, which provide the deep lithospheric mantle required to stabilize diamond as a mineral. This article was most recently revised and updated by, https://www.britannica.com/place/Canadian-Shield, The Canadian Encyclopedia - Canadian Shield, Canadian Shield - Student Encyclopedia (Ages 11 and up). The Sturgeon Lake Caldera in Kenora District, Ontario, is one of the world's best preserved mineralized Neoarchean caldera complexes, which is 2.7 billion years old. THE CANADIAN or Laurentian Shield, the largest natural region of North America at 1.1 million square mi (3 million square km), is located north of the St. Lawrence Lowland and east of the Interior Plains. Tourism is a fastdeveloping industry, especially on the southern margins, and is accompanied by growing public concern over preservation of the fragile shield environment. The physiographic region called the Canadian Shield: *A) is the geologic core of North America B) is an intermontane zone C) consists of extensive mountainous terrain D) is bordered on the west by the Appalachian Mountains E) is also known as the Arctic Coastal Plain

The boreal forest area gives way to the Eastern Canadian Shield taiga that covers northern Quebec and most of Labrador. The Canadian Shield’s most notable physical features are thousands of small lakes, thin layers of soil and rolling hills. The northeastern portion, however, became tilted up so that, in northern Labrador and Baffin Island, the land rises to more than 1,500 metres (5,000 feet) above sea level. 2. The rest of the region has coarse soil that does not retain moisture well and is frozen with permafrost throughout the year. Announcing our NEW encyclopedia for Kids!

The Canadian Shield is a collage of Archean plates and accreted juvenile arc terranes and sedimentary basins of the Proterozoic Eon that were progressively amalgamated during the interval 2.45–1.24 Ga, with the most substantial growth period occurring during the Trans-Hudson orogeny, between ca. Canadian Shield. The Canadian Shield! Omissions? Railroad lines extend from the Prairie Provinces to Churchill on Hudson Bay as well as to mining developments on the Great Slave Lake, Northwest Territories, and to James Bay in Quebec.

Updates? You just studied 6 terms! The Canadian Shield once had jagged peaks, higher than any of today's mountains, but millions of years of erosion have changed these mountains to rolling hills.[5]. The Canadian Shield is among the oldest on earth, with regions dating from 2.5 to 4.2 billion years. The Canadian Shield is more than 3.96 billion years old. The northeastern portion, however, became tilted up so that, in northern Labrador and Baffin Island, the land rises to more than 1,500 metres (5,000 feet) above sea level. Articles from Britannica Encyclopedias for elementary and high school students. The shield effectively divided eastern and western CANADA and posed a major barrier to westward migration.

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