Questions tagged [mantle-plumes]

Concerning the dynamics and chemistry of convectively upwelling plumes in the mantle, including questions relating evidence base, definition and controversies.

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Can non-antipodal Chicxulub impact seismic wave be connected to Rio Grande Rift and Laramide Orogeny?

I have conducted a brief survey of Internet sources and cannot locate any definite discussion of a possible connection between the Chicxulub impact and the inception or acceleration of the Rio Grande ...
Dalton Bentley's user avatar
3 votes
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What is the structure of the hot spot under Hawaii?

The Hawaiian Islands are formed by volcanic activity over a hotspot in the Earth's mantle. What is the shape of this hotspot in the mantle? Is it like a pyramid or a pillar or an upside-down pyramid?
Marijn 's user avatar
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1 vote
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Is the Pacific Plate composed of smaller plates?

The question, Why are all lower mantle plumes under oceans? has the following diagram which was taken from Wikipedia Commons. About half of the large red dots occur on or near the boundaries of ...
Fred's user avatar
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Is the Theia impact partly responsible for the distribution of mantle plumes?

I was looking at a map of the distribution of mantle plumes, and was wondering if they could be residual material that was either brought here or affected by the Theia impact. It seems to me that this ...
blacktopshaman's user avatar