Geology
Volcanic scoria from Stromboli (italy) - sample width is 15 mm)
Courtesy of M. Polacci, Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Pisa (Italy).
Volcanic pomice sample from Campi Flegrei (Italy). In the rigth image only the crystals after grayscale threshold segmentation are shown (D. Zandomeneghi et al., Geosphere, 6 (2010) 793-804, doi:10.1130/GES00561.1).
Last Updated on Wednesday, 16 November 2011 15:25
