5.19: Supercontinent Cycle and Pangaea
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Is this Earth?
The existence of Wegener’s supercontinent Pangaea is completely accepted by geologists today. The movements of continents explain so much about the geological activity we see. But did it all begin with Pangaea? Or were there other supercontinents that came before? What does the future of the continents hold?
Pangaea
The Appalachian mountains of eastern North America formed at this conver
The Appalachian Mountains in New Hampshire.
Pangaea has been breaking apart since abo
The Appalachians along the eastern U.S. These mountains formed when North America and Eurasia collided as Pangaea came together.
The Supercontinent Cycle
Back before Pangaea, there were earlier supercontinents. Rodinia existed 750 million to 1.1 billion years ago. Columbia existed 1.5 to 1.8 billion years ago. If the continents continue in their current directions, they will come together to create a supercontinent on the other side of the planet in around 200 million years.
This is known as the supercontinent cycle. The continents smash together on opposite side of the planet around every 500 million years. The creation of supercontinents is responsible for most of the geologic features that we see. It is responsible for many features
Summary
- Pangaea came together as a set of continent-continent convergent plate boundaries.
- Pangaea is still breaking up as the continents move apart. The Atlantic Ocean is getting bigger, and the Pacific Ocean is getting smaller.
k apart about every 500 million years. This is called the supercontinent cycle.The continents come together and brea
Review
- Describe the plate tectonics processes that brought Pangaea together.
- Describe the plate tectonics processes that split Pangaea up.
e will be another supercontinent in the future?Why do scientists think that ther
Explore More
Use the resource below to answer the questions that follow.
- How did the continents form?
current shape?When did the continents get their - Describe how North America will look 100 million years from now
. W hat will happen to Africa in the future?