- Saint Lawrence Lowlands
The St. Lawrence Lowlands is an
ecoregionof the Mixedwood Plains, a physiographic region of Canadaand the United States. It is sometimes named the "Great Lakes/St. Lawrence Lowlands", but it does not properly include the whole of the Great Lakes Basinwhich, while they may drain to the sea by way of the St.Lawrence, are nonetheless part of the Canadian Shieldphysiographic region. (For example, Lake Nipigon.)
The Lowlands have deep, arable soils deposited during the last glaciation, when the Canadian Shield was scraped clean of all its soils and these were pushed south. The Great Lakes basin was gouged out and then filled with water which drained to the sea by way of the deep faultline of the St. Lawrence. The primary defining geologic feature of the Lowlands is therefore the presence of deep soils within the watershed and estuary of the St. Lawrence River. This feature occurs in more than one distinct area along the river's course:
*Peninsular Ontario south and west of the Kawarthas plus
Hochelaga Archipelago( Montreal) and the surrounding area, including the lower Ottawa Valleyand the St Lawrence below the Thousand Islandsas far as Quebec City
* a narrow ribbon of land along both shores of the lower St Lawrence Estuary, hemmed in on the north shore by the
Canadian Shieldand on the south shore by the ranges of the Appalachian Highlands
Anticosti Island, the large island in the mouth of the estuary
* some lands along that shore of the Island of Newfoundland which faces into the flow of the river and has thus accreted alluvial soils from the Great Lakes basin
The Lowlands are split into these subregions by intrusions from adjacent physiographic regions. Peninsular Ontario lowlands are separated from the lowlands of the lower St Lawrence at the Thousand Islands by the geologic feature called the
Frontenac Axis, where ancient granites of the Canadian Shield cross over and become the Adirondacks. The next notable pinching occurs at Quebec City, where again the Shield meets the shore. Anticosti and Newfoundland, both being islands, are separated by stretches of open salt water.
There are some differences in terminology by Canadian and American geographers. American geographers group the lowlands of the Great Lakes basin with the
Great Plainsas part of the Interior Plains, while for Canadian geographers these are separated by hundreds of miles of harsh Shield. American geographers group the Adirondacks of New York into Appalachia and do not acknowledge their common origins with the Shield intrusion into Minnesota, again because of wide separation.
Even though the St. Lawrence Lowlands is the smallest landform region in Canada it is home to approximately 50% of Canadians. It is the urban sprawl of Canada. Because of its fertile soil and relatively small distance from its gigantic trading partner, the United States of America, the Lowlands are the commercial asset of Canada. The Lowlands are heavily industrialized and are abundant with agriculture, job opportunities, recreation spots, a transportation network, and even a national tourist attraction. Hence, the St. Lawrence Lowlands are the most industry-based landform in Canada, with about 70% of the country's manufacturing industries.
Wikimedia Foundation. 2010.
Look at other dictionaries:
Saint Lawrence (disambiguation) — Saint Lawrence or Saint Laurence (also St. Lawrence , St Laurence ) is a title applied to many things named after Saint Lawrence, the 3rd century Christian martyr. Saint Laurent is the French equivalent and San Lorenzo is the Italian and Spanish… … Wikipedia
Saint Lawrence River and Seaway — ▪ river, North America Introduction hydrographic system of east central North America. It connects the North River (source of the St. Louis River, in the U.S. state of Minnesota, which flows into Lake Superior) with Cabot Strait, leading into… … Universalium
Saint Lawrence — ▪ county, New York, United States county, northern New York state, U.S., bordered to the northwest by Ontario, Can., the St. Lawrence River (Saint Lawrence River and Seaway) constituting the boundary. Lowlands in the northwest rise to a… … Universalium
Saint-Jacques River — is a river in southwestern Quebec, Canada that drains the Saint Lawrence Lowlands. It flows in a general south to north direction, from the area around Saint Jacques le Mineur (in Les Jardins de Napierville) to its mouth in the Saint Lawrence… … Wikipedia
Lowlands — or The Lowlands can refer to;Geographic regions * Scottish Lowlands, all of mainland Scotland that isn t the Highlands (see also: Central Lowlands) * Northern European Lowlands, a region of Europe between the Central Highlands and the North Sea… … Wikipedia
Saint Petersburg — Leningrad redirects here. For other uses, see Leningrad (disambiguation). This article is about the city in Russia. For other uses, see Saint Petersburg (disambiguation). Saint Petersburg Санкт Петербург (Russian) Federal … Wikipedia
Geography of Canada — Canada Continent North … Wikipedia
Quebec — This article is about the Canadian province. For the province s capital city, see Quebec City. For other uses, see Quebec (disambiguation). Coordinates … Wikipedia
Canada — This article is about the country. For other uses, see Canada (disambiguation). Canada … Wikipedia
Ontario — This article is about the Canadian province. For other uses, see Ontario (disambiguation). Ontario … Wikipedia