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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