| http://www.w3.org/ns/prov#value | - At a guess autotrophs would exist on planets without plate tectonics, while photosynthesizers may be cyclical, crashing each time they run out of nutrients such as nitrogen, and so making oxygen atmospheres harder to detect.*E.g. margin mechanisms such as the recent one about slip eventually affecting the grain size at boundaries helpfully re starting plate tectonics.
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