Great Lakes/St. Lawrence Lowlands

Figure 34. Limestone cliffs along the Ottawa River at Parliament Hill, Ottawa, Ontario (R.J.W. Turner).
Figure 34. Limestone cliffs along the Ottawa River at Parliament Hill, Ottawa, Ontario (R.J.W. Turner).



Figure 35. Niagara Falls cascades over a resistant layer of dolostone (carbonate rock) that caps the cliffs of the Niagara River gorge in Ontario (A.V. Morgan).
Figure 35. Niagara Falls cascades over a resistant layer of dolostone (carbonate rock) that caps the cliffs of the Niagara River gorge in Ontario (A.V. Morgan).



Figure 36. Vegetated cliffs of shale, sandstone, and carbonate rock separate the upper and lower parts of Québec, Quebec (A.V. Morgan).
Figure 36. Vegetated cliffs of shale, sandstone, and carbonate rock separate the upper and lower parts of Québec, Quebec (A.V. Morgan).