Landforms Flashcards
What is the geological era of the Canadian Shield?
Precambrian
What is the geological era of the Great Lakes - St. Lawrence Lowlands?
Paleozoic
What is the geological era of the Western Cordillera?
Mesozoic - Cenozoic
What is the geological era of the Interior Plains?
Paleozoic
What is the geological era of the Innuitians?
Mesozoic
What is the geological era of the Arctic Lowlands?
Mesozoic
What is the geological era of the Appalachians?
Paleozoic
What geological processes formed the Canadian Shield?
- Used to be an area of mountains and volcanoes
- Erosion have created present topography
What geological processes formed the Great Lakes - St. Lawrence Lowlands?
Used to be under glaciers that retreated
What geological processes formed the Western Cordillera?
- Rocky + Columbia mountains formed by faulting and folding
- Interior Plateaus were formed by volcanic activity
- Coast Mountains = collision zone
What geological processes formed the Interior Plains?
- Seas covered the Interior Plains was deposited with sediments
- Was compressed into rock
What geological processes formed the Innuitians?
- Erosion has not worn down mountains yet
- Shaped when North American plate moved north
What geological processes formed the Arctic Lowlands?
- Glacier sunk Canadian Shield, then retreated
- This formed lowlands - still rising
What geological processes formed the Appalachians?
- North American plate collided with African, forming mountains
What rock types are in the Canadian Shield?
Igneous, Metamorphic
What rock types are in the Great Lakes - St. Lawrence Lowlands?
Sedimentary