- ThePacificRingofFireisthemostgeologicallyactiveregionofEarth.TheNabrovolcanohasnoteruptedinrecordedhumanhistory,butlavaflowsnearthevolcanoarerelativelyrecentgeologically.ApolloastronautsusedseismometersduringtheirvisitstotheMoonanddiscoveredthatthegr...
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- 1、Thereversaltakesarelativelyshortamountoftime,geologicallyspeaking,onlyafewthousandyears.2、ApolloastronautsusedseismometersduringtheirvisitstotheMoonanddiscoveredthatthegrayorbisn'tatotallydeadplace,geologicallyspeaking.3、Withinabout50millionyea...
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