REEY geochemistry of the Erguita section. (a) Average PAAS-normalized REEY patterns compared to modern seawater (Alibo and Nozaki, 1999). Light (L)REE (La to Nd), Middle (M)REE (Sm to Dy), and Heavy (H)REE (Ho to Lu). Geochemical data of PAAS are from Taylor and McLennan (1985). (b) Sm/Yb)_SN vs. (Sm/Pr)_SN, after Garnit et al. (2012). Data of SW are from Alibo and Nozaki (1999). (c) Ce anomaly vs. Pr anomaly, after Bau and Dulski (1996). (d) Cross plot between Y/Ho and Zr showing the source of REE within the depositional environments. The Y/Ho ratios indicate a mixing source of REE.