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RT @SeafloorScott: Know your a'a from your pahoehoe? #springerlink https://t.co/Vkzh8BBEE3
RT @SeafloorScott: Know your a'a from your pahoehoe? #springerlink https://t.co/Vkzh8BBEE3
RT @SeafloorScott: Know your a'a from your pahoehoe? #springerlink https://t.co/Vkzh8BBEE3
RT @SeafloorScott: Know your a'a from your pahoehoe? #springerlink https://t.co/Vkzh8BBEE3
RT @SeafloorScott: Know your a'a from your pahoehoe? #springerlink https://t.co/Vkzh8BBEE3