13 votes

Is the Mauna Loa CO$_\mathsf{2}$ record affected by the nearby mantle plume?

How is ist possible that Mauna Loa Observatory is the International Reference Observatory for CO2 Global Meassurments I don’t know that it is ‘the International Reference Observatory’. The Mauna Loa ...
Pont's user avatar
  • 5,429
5 votes

How can linear oceanic ridges (like the East Pacific Rise) be explained by single point mantle plumes?

Hot spots and ridges are two different things. Hot spots stay in one place while the earth crust above them drifts and thus create a line of dormant volcanoes, they are a point features so to say. ...
Erik's user avatar
  • 756
3 votes

Why are all lower mantle plumes under oceans?

Mantle plumes are part of the movement driving plate tectonics. These movements push continental plates apart making oceans. It's not that they occur in oceans, they cause oceans. As pointed out in ...
Josh King's user avatar
  • 321
2 votes

How can linear oceanic ridges (like the East Pacific Rise) be explained by single point mantle plumes?

hot spots help/control how spreading centers form but they are not what keeps them going. If you push on a thin amorphous material perpendicular to the surface they tend to crack/split at three ...
John's user avatar
  • 6,891
2 votes
Accepted

Effect of reducing conditions on melting point

As you probably know, the melting temperature in the mantle is a function of H2O contents. The more H2O you have, the lower the melting point of the rocks (i.e. dry vs wet solidus in the sketch). A ...
Gimelist's user avatar
  • 23.1k

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