R8201
Olivine, clinopyroxene, plagioclase glomerocryst.
Vesicles with olivine, plagioclase, and clinopyroxene
phenocrysts set in an intergranular to intersertal matrix.
Olivine phenocrysts with thin reaction rim. Vesicles also
seen along with plagioclase phenocrysts.
Zoned plagioclase phenocrysts with several resorption zones
indicating that plagioclase was periodically on and off the liquidus
suggesting several magma chamber replenishment episodes.
Severely resorbed plagioclase phenocryst
with
overgrowth.
Olivine phenocrysts are also present. XP.
