Canada's 'Missing Gravity'

[sherlew99]

How Stuff Works
Science


How can parts of Canada be 'missing' gravity?

by Jacob Silverman Science | Geophysics



For more than 40 years, scientists have tried to figure out what's causing large parts of Canada, particularly the Hudson Bay region, to be "missing" gravity. In other words, gravity in the Hudson Bay area and surrounding regions is lower than it is in other parts of the world, a phenomenon first identified in the 1960s when the Earth's global gravity fields were being charted.

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[pickinduck]

How was Hudson Bay formed? Did it start as a creator?

[sherlew99]

Oh, you mean a crater? Not as such. According to Infoplease, Hudson Bay was formed by huge, heavy sheets of ice that left a crater-like impression when they retreated. Some think that it was formed by an impact crater, but no evidence of this has been found. I think the glacier theory is much more plausible.