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| On May 4, 1973, workmen laid additional pipes to carry seawater up onto the lava flow front and tephra bulwark to cool and harden the still-flowing lava behind the chilled lava margin. |
Saturday 18 January 2020
On May 4, 1973, workmen laid additional pipes to carry seawater up onto the lava flow front and tephra bulwark to cool and harden the still-flowing lava behind the chilled lava margin.
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