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Q: How many times has rifting occurred along eastern north America since 600 million years ago?
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What are the two continental masses resulting from the first rifting of Pangaea?

The two continental landmasses resulting from the first rifting of Pangaea are Laurasia in the north and Gondwana in the south. These two landmasses eventually broke apart and drifted to their current positions, forming the continents we see today.


Is the pieces of the super-continent Pangaea began to drift apart about 255 million years ago?

Yes, the pieces of Pangaea began to drift apart about 175 million years ago, leading to the formation of separate continents as we know them today. This process, known as continental drift, was a result of plate tectonics and the movement of the Earth's lithosphere.


Is rifting the opposite of subduction?

In a way. In rifting, crust is created. In subduction, crust is destroyed.


Do convergent plate boundaries involve the process of rifting?

No. Rifting is associated with divergent boundaries.


What is the difference between continental rifting and oceanic rifting?

ones on land the other under water


Which regimes are associated with normal faults?

Rifting.


What is the relation between rising and sinking material in the earths interior and subduction and rifting?

Rising materials causes rifting; sinking material causes subduction.


Which fault occurs at divergent boundary?

Normal Faults, (Rifting).


Rifting under water?

seperations of plates forming oceans


Where does Continental rifting or divergence continue today?

East-Africa.


Built up heat from the mantle that weakens lithosphere causes?

rifting


Can smaller continents form from larger continents by rifting?

No. Its through paleomagnetism.