Fig. 4. Rio Boba plutonic sequence. (a) Modal compositions of the gabbroic rocks compared to those of the lower and middle crustal gabbros and Moho Transition Zone (MTZ) sills of the Oman ophiolite and the Puerto Plata ophiolite complex (compiled by Marchesi et al., 2006 and Escuder-Viruete et al., 2014). (b) Modal compositions of the ultramafic. See text for explanation.