Questions tagged [continental-crust]

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3
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1answer
53 views

Was Zealandia above water during the last Ice age?

Was Zealandia above sea level during the last ice age? Like how Sahul or Sundaland were?
4
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1answer
78 views

How does new continental crust form? [duplicate]

New oceanic crust is formed at mid-ocean ridges, then destroyed during subduction. Continental crust can be destroyed with erosion, or when the crust gets too thick (under mountains) and starts to ...
6
votes
1answer
67 views

Why is calcium so much more abundant in/on Earth's crust (and oceans) than it is elsewhere? (relatively speaking…)

Inside the entire Earth as a whole, and throughout our Solar System and galaxy, etc., magnesium is at least 14 times (or more) as common as calcium, atom-per-atom. But, on Earth's crust and oceans, ...
2
votes
1answer
89 views

Amount of Distortion at Continental Collisions

Something that I've wondered for a while now - When continents collide, how much of the landmass gets distorted by the collision before it settles? To perhaps give a clearer idea of what I'm talking ...
1
vote
1answer
195 views

How deep could the Vredefort asteroid have penetrated? [duplicate]

The asteroid which created the Vredefort impact crater in South Africa is estimated to have been between 10 and 16 km in diameter (the uncertainty is due to the age of the crater, which is more than 2 ...