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On Earth, our tectonic plates are in constant motion.
When a hot spot in the mantle begins feeding a volcano, the plate moves over it.
The volcano goes dormant as the crust moves away from the heat source.
And the hot spot keeps building a new volcano on the new section of crust above it.
Mars is different.
Mars has no active tectonic plates.
The crust is thick, cold, and essentially stationary.
So when a