Taphonomic Processes in Diatomaceous Laminites of the Pleistocene Shiobara Group (Caldera-Fill, Lacustrine), Northeastern Japan Tuzino, Taqumi and Maeda, Haruyoshi and Maeda, Yoko, Paleontological Research, 13, 213-229 (2009), DOI:http://dx.doi.org/10.2517/1342-8144-13.3.213