Pearl and Hermes Reef - John Seach

Pearl and Hermes Reef is located in the Hawaiian-Emperor volcanic chain, SE of Midway.
Dredging of the reef has produced round clasts of alkalic basalt, hawiite, and nepheline phonolite.

Eruptions of Pearl and Hermes Reef Volcano
21 million years ago
 

Pearl and Hermes Reef
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Copyright John Seach