What is the bedrock geological map of Canada?
Bedrock geological map of ... The map displays bedrock formations at or near the surface of the land, on the sea floor above the continental crust that forms the Canadian landmass, and oceanic crust surrounding the landmass. The bedrock units are grouped and coloured according to geological age and composition.
How deep is the bedrock in Toronto?
In most of the city the bedrock is 30 m or more below the ground surface; most buildings and tunnels in Toronto are founded on or built through soil rather than rock. Structures near the waterfront are an exception; the bedrock is much closer to the surface and becomes an important construction challenge.
What is the bedrock geology data set?
The Bedrock Geology Data Set is a Geological map of the Province and shows the distribution of bedrock units underlying Ontario. It illustrates geological rock types, major faults, iron formations, Kimberlite Intrusions and dike swarms.
What happens when you excavate into Toronto's shale bedrock?
When you excavate into the shale bedrock underlying Toronto, it swells and squeezes. If you take a sample of Toronto’s shale bedrock out of the ground you can watch and measure it as it increases in volume; the sample actually gets bigger.
Metro. Toronto: bedrock contours