Day #54 Deskcrop: Porphyritic Olivine Basalt

I think it’s time this deskcrop series revisited Hawaii. Today’s sample is from a roadcut through the 1907 Mauna Loa flows – not the youngest rock I’ve got, but close.

Porphyritic Olivine Basalt

Explore this and all of my 2010 Deskcrops and Outcrops in Google Earth!

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