Are all shell-beds made in the same way?: The genesis of Oligocene 3D shell rich concentrations from Antarctica - Quaglio, Fernanda; Warren, Lucas; Simões, Marcello Guimarães; Anelli, Luiz Eduardo; Gazdzicki, Andrzej; Strikis, Pedro Carlos; Ghilardi, Renato Pirani; Tossi, Andressa Barraviera; Santos, Paulo Roberto dos; Rocha-Campos, A. C. (Congreso Latinoamericano de Sedimentología, 2013)