AA Lava at Sullivan Bay on Santiago Island in Galápagos, EC - Encircle Photos

9 AA Lava at Sullivan Bay on Santiago Island in Galápagos, EC

You will also examine a’a (or aa) lava at Sullivan Bay. This Hawaiian term describes when lava rapidly flows down a steep slope. It leaves behind rugged surfaces with a spectrum of reds, oranges and browns caused by the oxidation of the material’s iron. In a few places, the molten crust heaved up and snapped into pieces during tremors. This allows you to examine the successive lava flows like rings in a tree. The field’s average depth is about five feet.

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Sullivan Bay, Santiago Island, Ecuador

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