Image of the Day

66 / 364

Alvin collecting popping rocks.

Rock Grab

A pilot inside the submersible Alvin uses one of the vehicle's manipulator arms to pick up some unusual geological samples: popping rocks. WHOI scientists collected them in 2016, on this expedition to the Mid-Atlantic Ridge funded by the National Science Foundation. Gases from deep inside the Earth are trapped in tiny glass vesicles inside popping rocks. Once the rocks are brought to the surface, they are no longer under deep-sea pressure, and their gases escape with a characteristic “pop!” Scientists are analyzing these gases for clues to the composition and evolution of Earth's mantle. (Mark Kurz, WHOI, Eric Mittelstaedt, Univ. of Idaho/NSF/HOV Alvin 2016 ©Woods Hole Oceanographic Institution )


Image and Visual Licensing

Text, images, graphics and other material contained on this website are subject to copyright. For more information or to license material, please contact the Director of Digital Assets, or (508) 289-2647.

Explore Visual WHOI

Search multimedia database

License our Visuals