Northern Ontario Rock Face
by Nina Silver
Title
Northern Ontario Rock Face
Artist
Nina Silver
Medium
Photograph - Digital Photograph- Photo Paint
Description
Along the highways and along the shores of the river and lakes in northern Ontario, Canada, you can find stunning remains of the Cambrian shield. Rock left over from the ice age has been blasted through to allow for roads and development that boomed in the 1960's and is still occasionally interfered with in the name of progress.
Information for the Canadian Shield Foundation tell us,
"The Canadian Shield, also known as the Precambrian Shield or Laurentian Plateau, covers about half of Canada as well as most of Greenland and part of the northern United States; an area of 4.4 million square kilometers (1.7 million square miles).It is the oldest part of the North American crustal plate and contains fossils of bacteria and algae over 2 billion years old. The shield is composed of granite and the earth’s greatest area of exposed Precambrian rock (igneous and metamorphic rock formed in the Precambrian geological era 500 million years ago).
The shield was the first part of the continent to be permanently raised above sea level. Subsequent rising and falling, folding, erosion and continental ice sheets have created its present topography. The reoccurring invasion and withdrawal of the ice sheets (1.6 million to 10,000 years ago) depressed the surface creating Hudson Bay, scraped out tens of thousands of lake basins, carried away much of the soil cover and redeposited glacial debris.
The shield plateau ranges from 305 to 610 meters (1000 to 2000 feet) above sea level. In northern Labrador and Baffin Island the crustal plate has tilted so much that it rises over 1,500 meters (5,000 feet) above sea level.
In the U.S, there are also a number of mountain ranges within the shield: the Adirondack (northeastern New York state), Superior Highlands (northern Minnesota, Wisconsin & Michigan states), Torngat and Laurentian."
When taking road trips around Ontario, I only feel like I have left the city when I am surrounded by these majestic piece of ancient rock.
Uploaded
September 3rd, 2014
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Viewed 196 Times - Last Visitor from Fairfield, CT on 04/25/2024 at 6:59 AM
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Comments (2)
Paul Davenport
very unusual rock... don't think I have seen anything quite like that before:-)
Nina Silver replied:
This rock is part of the Northern Ontario Cambrian Shield. It was left over from the Ice Age. Much of it has been blasted through in order to create highways in Northern Ontario, Canada.