The four types are: PLUME – this is magma associated with the plume itself and is similar to magmas from other ocean islands within the Pacific. It has the characteristics of intermediate Strontium (Sr), Neodymium (Nd) and Lead (Pb) ratios. The PLUME lavas are found predominately in the west of the islands, around Ferdinandina and Isabela Islands, which is near to the current position of the hotspot.