| Text Description: |
Agglutinate from large blocks that have fallen from higher up section at Site 7. This sample is from the contact between red scoriaceous material and gray massive material. Fine-grained, holocrystalline, seriate porphyritic with a matrix of mesostasis, opaque, plagioclase and alteration. Plagioclase phenocrysts (An45-An62) are up to 1 mm, some display sieve textured zones or rarely oscillatory zoning, and normal zoning is common. Orthopyroxene phenocrysts are up to 0.8 mm and frequently display clinopyroxene rims. Clinopyroxene phenocrysts are up to 0.5 mm. An altered phase, up to 0.7 mm, is present. |