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 the open network of bubbles. The delicate glass
threads between the bubbles are so fragile that reticulite was first called
"thread-lace scoria" by the great American mineralogist, James Dana. It
has also been called limu.
|Reticulite erupted from Kilauea Volcano, Hawai'i.
Credit: J. D. Griggs / U.S. Geological Survey
AND PLANETARY SCIENCE
Source: U.S. Geological Survey