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Oil Shale or Tar Sands

North AmericaEconomicPhysical Environment

Locations of major sedimentary rock formations and loose sands containing petroleum in North America

A map of North America highlighting oil shale or tar sands areas shaded in red. The region along the boundary of Utah in the northeast along with Wyoming is shaded. The northern region of Alberta is also shaded.

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Oil Shale or Tar Sands	Areas of Strong Tornado Occurrence				Male-Female Ratio
Oil Shale or Tar Sands	Areas of Strong Tornado Occurrence	Areas of Strong Tornado Occurrence	Areas of Strong Tornado Occurrence	Areas of Strong Tornado Occurrence	Class	Rank	Ratio of males to females







11.5%	43.92	15.166666666666666	4.954545454545454	1.4285714285714286

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