Figure F16. Multichannel seismic reflection profile (MAR13) showing the location of Site 1194 and basement reflection (dashed line). Shown are examples of thin sections of altered olivine basalts that comprise basement in this region. A. Thin section view showing the products of alteration (zeolites-natrolite) infilling an amygdaloid under cross-polarized light. B. Thin section view showing the infilling of veins with plagioclase under cross-polarized light. C. General thin section view under cross-polarized light showing olivine phenocrysts and plagioclase lathes. D. Magnetic inclination data from the basement sequence.

Figure F16. Multichannel seismic reflection profile (MAR13) showing the location of Site 1194 and basement reflection (dashed line). Shown are examples of thin sections of altered olivine basalts that comprise basement in this region. A. Thin section view showing the products of alteration (zeolites-natrolite) infilling an amygdaloid under cross-polarized light. B. Thin section view showing the infilling of veins with plagioclase under cross-polarized light. C. General thin section view under cross-polarized light showing olivine phenocrysts and plagioclase lathes. D. Magnetic inclination data from the basement sequence.