News archive - May 1992

Sunday, May 24, 1992

Continental drift, plate tectonics, and formation of sedimentary basins off the east coast of Canada

S. Srivastava

Have you aver wondered: why the Atlantic coastlines of South America and Africa look as though they could fit together; why a chain of volcanoes lies along the west coast of Canada; and why most of the oil and gas offshore lie off the east, and not the west coasts of Canada? All of these phenomena can be explained by one theory known as Plate Tectonics.

Sunday, May 24, 1992

Outdoor radon levels in Canada

R.L. Grasty

There is great concern, particularly in the United States regarding the concentration of radon inside homes. In the United States radon is believed to cause a significant number of deaths from lung cancer. However, very few measurements have been made of the radon concentration in outdoor air.

Sunday, May 24, 1992

Target Earth

Richard A.F. Grieve

As we go about daily living, we are reminded in many ways that we do not exist in isolation. We are part of a much larger symbiotic system of life on earth and it is even popular these days to talk of the earth as if it were a single, closed system. The earth, however, does not exist in isolation.

It is a planet in the solar system and, as such, is subjected to solar system processes. One such process is the impact of interplanetary asteroids and comets.

Sunday, May 24, 1992

Volcanoes in Canada

Catherine Hickson

Volcanoes in Canada? Yes! Canada’s western margin is geologically extremely active. This activity is the result of living on the edge of the huge North American continent, actually a giant tectonic "plate". Off the coast of British Columbia this plate runs into another tectonic plate. The jamming together of these plates creates earthquakes and volcanoes! (Figure 1 on previous page).

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