What is the asthenosphere?

A plastically deforming solid upper mantle.

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  1. The inner core
  2. A plastically deforming solid upper mantle ✔
  3. A liquid ocean layer

Why: Tectonic plates move across the plastically deforming, solid upper mantle called the asthenosphere.

Huh, didn't know that: Tectonic plates move across the plastically deforming, solid upper mantle called the asthenosphere.

The dad joke
The asthenosphere goes with the flow.
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References

Answer: A plastically deforming solid upper mantle. Tectonic plates move across the plastically deforming, solid upper mantle called the asthenosphere.

  1. Geology en.wikipedia.org/wiki/Geology
    the plastically deforming, solid, upper mantle, which is called the asthenosphere
    Checked 2026-11-07.

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