Impossible graphic on water bottle

Dscn1748 (Click on thumbnail for enlargement) Here's a graphic on the back of a bottle of Fiji water. It shows rain being filtered through volcanic rock. But the "artesian aquifer" is completely surrounded by "impermeable rock." If it's really impermeable, how can the rain water permeate it to refresh the aquifer?

Mark Frauenfelder

My latest book, Made by Hand, now in paperback. Follow me on Twitter.

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