MICHAEL SZOENYI / SCIENCE PHOTO LIBRARY MICHAEL SZOENYI / SCIENCE PHOTO LIBRARY
Phonolite sample. Phonolites are very light and porous rocks produced by volcanoes. The name refers to the different sounds heard when striking these rocks, depending on their composition and shape. This sample is from the Chinyero volcano, the last volcano to erupt on Tenerife, in the Canary Islands.
Model release not required. Property release not required.