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Randy Dickau (left), one of Scripp’s Resident Technicians, and Dan Fornari (right) steady the rock corer for a deployment. Randy is giving instructions with hand signals to the person operating the winch. We have started using the rock corer to take small samples of volcanic glass from the lava pillows. It weighs about 400 pounds and has seven cutters on the end. We send the corer down on a wire and crash it into the seafloor lava flows. The glass that chips off the lava gets stuck in the surfboard wax that fills the cutters.

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