Québec’s landscape varies from one region to another.
The region north of the St. Lawrence River has many low, rounded mountains. Along the river, the landscape is flat. The region south of the river is also very mountainous, but the mountains are higher and more undulating than in the north.
Each of the three physiographic regions corresponds to a specific geological domain composed of rocks of different origin and age.
Since the geological history varies from one region to another, each region is composed of distinct igneous rocks (formed of solidified magma), metamorphic rocks (formed by the recrystallization of pre-existing rocks) and sedimentary rocks (formed of accumulations of rock fragments or chemical elements).
Thus each geological domain or physiographic region has, depending on the nature of its bedrock, its own specific mineral resources.
From north to south, the three physiographic regions are called "the Canadian Shield," "the St. Lawrence Platform," and "the Appalachians."
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