Koko Seamount, South East - John Seach

Koko Seamount is located at the northern half of the Hawaiian-Emperor volcanic chain.
Samples of rounded beach cobbles have been samples at Koko Seamount - South East part.

The samples included theoleiitic basalt, alkalic basalt, hawaiite, mugearite, trachyte, and phonolite.

Eruptions of Koko Seamount - South East
48 million years ago
 

Koko Seamount - South East
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Copyright John Seach