ROV arm collecting rock sample form the 1868 lava flow in order to confirm the age of the substrate using geochemical ratio and weathering analysis. The laser points (red dots) are 10 centimeters (~4 inches) apart and are used by scientists to determine the sizes of things that they are seeing.

ROV arm collecting a rock sample from the 1868 lava flow in order to confirm the age of the substrate using geochemical ratio and weathering analysis. The laser points (red dots) are 10 centimeters (~4 inches) apart and are used by scientists to determine the sizes of things that they are seeing. Image courtesy of the NOAA Office of Ocean Exploration and Research, 2015 Hohonu Moana.

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August 30: Understanding the Development of Deep-water Precious Coral Communities Using Submarine Lava Flows From the Mauna Loa Volcano, Hawaii

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