Reticulite erupted from Kilauea Volcano, Hawai'i. Credit: J. D. Griggs / U.S. Geological Survey Basaltic pumice in which nearly all cell walls of gas bubbles have burst, leaving a honeycomb-like structure. Even though it is less dense than pumice, reticulite does not float in water because of t...
a light, porous volcanic rock that forms during explosive eruptions