“…In Antarctica, to the best of our knowledge when submitting this paper, only the Tumbledown Crags rock glacier on James Ross Island has been drilled (at two boreholes) (Fukui et al, 2008). The internal structures of some rock glaciers were investigated through geophysical electrical soundings (especially vertical DC soundings in the past and, more recently, by means of electrical resistivity tomography (ERT) (Haeberli, 1985;King et al, 1987;Evin and Fabre, 1990;Guglielmin et al, 1994Guglielmin et al, , 1997Hauck, 2001;Hauck et al, 2001;Maurer and Hauck, 2007;Ribolini et al, 2007Ribolini et al, , 2010 and ground penetrating radar (GPR) (Berthling et al, 2000;Lehmann and Green, 2000;Degenhardt et al, 2003;Fukui et al, 2007;Hausmann et al, 2007;Monnier et al, 2008;Degenhardt Jr., 2009;Leopold et al, 2011;Merz et al, 2015;Hartl et al, 2016). The internal structures of some rock glaciers were investigated through geophysical electrical soundings (especially vertical DC soundings in the past and, more recently, by means of electrical resistivity tomography (ERT) (Haeberli, 1985;King et al, 1987;Evin and Fabre, 1990;Guglielmin et al, 1994Guglielmin et al, , 1997Hauck, 2001;Hauck et al, 2001;Maurer and Hauck, 2007;Ribolini et al, 2007Ribolini et al, , 2010 and ground penetrating radar (GPR) (Berthling et al, 2000;Lehmann and Green, 2000;…”