Figure F53. Interpretative summary of the lithology, morphology, and mineralogy of basaltic lava flows sampled in the basement (Unit VI) at Site 1138. Boundaries for igneous Units 3-22 are indicated. We illustrate the structural variations through the section schematically, assigning unrecovered core to the overlying unit. Flow types are pahoehoe (P), aa (A) and transitional (T). The presence of plagioclase (PL), clinopyroxene phenocrysts (CPX), and olivine microphenocrysts (OL) is indicated.