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Basalt yea?
Basalt, yeah, and the name for that sort of geologic structure formed out of it is columnar jointing: https://en.wikipedia.org/wiki/Columnar_jointing
Basalt yea?
Basalt, yeah, and the name for that sort of geologic structure formed out of it is columnar jointing: https://en.wikipedia.org/wiki/Columnar_jointing