Contact: Kea Giles
Geological Society of America
Caption: This shows tubular features in 15 million-year-old impact glass from the Ries Impact Structure, Germany. See related article by H.M Sapers et al., http://dx.doi.org/10.1130/G35293.1.
Credit: H.M. Sapers et al./Geology
Usage Restrictions: Credit to authors & Geology
Related news release: Scratching the surface: Microbial etchings in impact glass and the search for life on Mars