Figure F15. A. Seismic Line IBM3-NW5 (see Fig. F22B) (M. Yamashita, per. comm., 2014) runs from the Manji rear-arc seamount chain (northwest) to the Enpo rear-arc seamount chain (southeast). The two volcanic chains are separated by a volcano-bounded basin, herein named the Enpo-Manji Basin. Manji has 40Ar/39Ar ages of 6.86 and 6.53 Ma, and the unnamed southeast volcano has a 40Ar/39Ar age of 1.96 Ma (see Fig. F22A). B. Interpreted seismic layers in the Enpo-Manji Basin.
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