Transposition and interference patterns in the Apuan Alps, Northern Apennines, Italy : M. Boccaletti,∗ S. Capitani,∗ M. Coli,∗ G. Fornace,† G. Gosso,† G. Grandini,∗ F. Milano,† G. Moratti,‡ P. Nafissi∗ and F. Sani,∗∗ Department of Earth Science, University of Florence, 50121 Italy, † Geological Institute, University of Turin, 10123 Italy, ‡ Unit of Appennio Geology, University of Florence, 50121 Italy