Questions tagged [continental-crust]

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4 votes
1 answer

Do subducted continents rise up again through ridges?

Layman here, sorry if this is a stupid question. I have a geology friend who recently told me that plate tectonics is like how warm milk cools on top to form thin solid layers. The convection cells in ...
AlphaLife's user avatar
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2 votes
1 answer

Does this support Hapgood's Earth Crust Displacement Theory?

I'm no Geologist by any standard but I'm quite intrigued by what goes on below our feet. I came across this article that states there's a new or (confirmed) partially melted layer in the athenosphere (...
Andyhasaquestion's user avatar
10 votes
2 answers

How has the total area of continents changed during the Earth history?

Earth's total land area has increased throughout its history according to this video. What is the dependence of the total area of continents from time?
Imyaf's user avatar
  • 103
4 votes
5 answers

Is There a Correlation Between Earthquake Magnitude and the Deformation Observed in the Rock?

I've been doing a little geology research. One of the topics that I noticed was the existence of "deformations" that appear in the rock layers if an earthquake has occurred. Smaller ...
Mathematician's user avatar
5 votes
1 answer

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?
Qad's user avatar
  • 51
5 votes
1 answer

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 ...
usernumber's user avatar
7 votes
1 answer

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, ...
Kurt Hikes's user avatar
2 votes
1 answer

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 ...
N Francis's user avatar
  • 241
1 vote
1 answer

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 ...
Michael Walsby's user avatar