Asked by juhh
stagnant lid and small, short‑lived proto‑plates and mantle overturns whose collisions and recycling gradually stabilized crust. WHAT BOUNDARY IS THIS
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GPT-5 mini
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That description points to a convergent (collisional) plate boundary — specifically suture zones formed by collisions of small proto‑plates during an early, stagnant‑lid/incipient‑plate regime.
Why: collisions and recycling (local subduction or mantle overturns) are the processes that weld crustal blocks together and stabilize continental crust; the structural expression of those collisions is a convergent/collisional boundary (a suture).
(If you instead meant the interface between the rigid stagnant lid and the convecting mantle, the relevant boundary would be the lithosphere–asthenosphere boundary.)
Why: collisions and recycling (local subduction or mantle overturns) are the processes that weld crustal blocks together and stabilize continental crust; the structural expression of those collisions is a convergent/collisional boundary (a suture).
(If you instead meant the interface between the rigid stagnant lid and the convecting mantle, the relevant boundary would be the lithosphere–asthenosphere boundary.)
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