Thin sections photos taken with an optical microscope. Print on cotton paper, 21 x 29,5 cm, 2016 Distribution of the Sands Frottages of the Samples Museo di Palazzo Poggi, BolognaSassi/Stones. Reading the rockFrottages Palazzetto Tito, VeniceEvaluation of the Fine Dust admin2017-02-19T17:46:02+00:00