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Posts tagged Canadian Shield

Fires East of Lac la Ronge, Canada

55.1N 104.9W

July 16th, 2012 Category: Fires

Canada – July 13th, 2012

Fires near the border between the provinces of Saskatchewan and Manitoba, Canada, release plumes of smoke towards the southeast. A band of smoky haze also sweeps across the image. On the left side, just north of the haze, is Lac la Ronge, a glacial lake in Saskatchewan. It is the fifth largest lake in the province. It is approximately 250 km north of Prince Albert, on the edge of the Canadian Shield.

Snow Terrain of Manitoba Near Nelson River, Canada

56.5N 94W

May 18th, 2010 Category: Rivers

Canada - April 27th, 2010

Canada - April 27th, 2010

The Nelson River seems to create a dividing line between the snow-covered landscape to the north and the snow-free terrain to the south. It is a river of north-central North America, in the Canadian province of Manitoba.

The Nelson River has a full length is 2575 km (1600 mile), has mean discharge of 2370 m3/s (3100 yd3/s), and a drainage basin of 982900 km2 (379500 sq. mile), of which 180000 km2 is in the United States. The river drains Lake Winnipeg and runs 644 km (400 mile) before it ends in Hudson Bay.

The river flows through the Canadian Shield out of Playgreen Lake at the northern tip of Lake Winnipeg, and flows through Cross Lake, Sipiwesk Lake, Split Lake and Stephens Lake.

The river flows into Hudson Bay at Port Nelson, just north of the Hayes River and York Factory. It has a flow at its mouth of 2066 m3/s.

Since it drains Lake Winnipeg, it is the last part of the large Saskatchewan River system, as well as that of the Red River and Winnipeg River. Besides Lake Winnipeg, its primary tributaries include the Grass River, which drains a long area north of Lake Winnipeg, and the Burntwood River, which passes through Thompson, Manitoba.

Straits of Mackinac and Whitefish Bay on the Great Lakes, USA and Canada

45.8N 84.7W

March 28th, 2010 Category: Lakes

USA - March 5th, 2010

USA - March 5th, 2010

The Straits of Mackinac, below, is the strip of water that connects two of the Great Lakes, Lake Michigan (lower left) and Lake Huron (lower right), and separates the Lower Peninsula of Michigan from the Upper Peninsula of Michigan.

It is five miles (8 km) wide at its narrowest point, where it is spanned by the Mackinac Bridge, and 120 feet (37 m) deep. Hydrologically, the straits do not connect two separate lakes, but rather are a narrow point defining two lobes of a single Lake Michigan-Huron. Before icebreakers and year-round shipping on the Lower Great Lakes, the Straits would freeze over in winter, in fact, much ice is visible here on the surface.

Moving northward, part of Lake Superior is visible in the upper left quadrant. The large white area is the frozen Whitefish Bay, a large bay on the eastern end of the lake’s southern shore between Michigan and Ontario. It begins in the north and west at Whitefish Point in Michigan, about 10 miles north of Paradise, Michigan and ends at the St. Marys River at Sault Ste. Marie on the southeast.

The eastern side of the bay on the Ontario side is more rugged, largely wilderness of the Canadian Shield. The international boundary runs through the bay, which is heavily used by shipping traffic northbound and southbound from the Soo Locks.

Landscape of Canadian Shield and Prairies

53.9N 101.7W

June 18th, 2009 Category: Snapshots

Canada - June 2nd, 2009

Canada - June 2nd, 2009

The Canadian land visible here belongs to the provinces of Manitoba (right) and Saskatchewan (left). The tan southern land visible in both provinces is part of the Canadian Prairies, while the green and snow-dusted terrain to the north is part of the Canadian Shield.

The praries are part of a vast sedimentary plain. They generally describe the expanses of largely flat, arable agricultural land which sustain extensive grain farming operations in the southern part of the provinces.

The Canadian Shield, on the other hand, is a vast rock base that mostly consists of eroded hilly terrain covered primarily by green boreal forest. The region also contains many important rivers used for hydroelectric production.

The Shield cannot support intensive agriculture, although there is subsistence agriculture and small dairy farms in many of the river valleys and around the abundant lakes, particularly in the southern regions.