Mugearite (Olivine-bearing)
“An olivine-rich island lava variant”
Olivine-bearing mugearite is a variety of mugearite that retains olivine phenocrysts, indicating a slightly less evolved magma composition than typical mugearite. This variant is particularly common in the early alkaline stages of ocean island volcanism.
olivine (phenocrysts), plagioclase (andesine), augite, magnetite, apatite, kaersutite
Hawaiian Islands (Haleakalā, Maui), Canary Islands (La Palma), Réunion, Galápagos Islands, Society Islands (French Polynesia)
5.5-6
On Maui's Haleakalā volcano, olivine-bearing mugearite erupted as recently as about 400 years ago, making it among the youngest volcanic rocks in the Hawaiian island chain outside the Big Island.
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