The volcaniclastic siltstone is composed of crystals (olivine, pyroxene, quartz), glass (globules and irregularly shaped shards) and rock fragments.
We witness actions, confessions, and shards of a love story, but never long enough for them to coalesce into a grand narrative.
These comprise completely recrystallized platy and cuspate former glass shards up to 200 m in diameter.
In the massive tuffs, vitric to crysto-vitric varieties show delicately shaped glass shards and broken phenocrysts of euhedral quartz, plagioclase, muscovite, orthoclase, zircon and ilmenite.
Each analysis represents the average of several shards.
Any residual shards of sarcotesta were removed by rinsing in distilled water, and the surface of the clean seeds was blotted dry.
The hyaloclastites consist of rubble smaller than 60 cm across and a fine-grained matrix composed of glass shards.
So the surface clearly wasn't made from a single sheet, but from a set of long thin shards.
