Don't Spilite

A volcanic rock from oceanic pillow lava. Once full of bubbles now (in this sample) filled with calcite and zeolite. The layering seems to be more (greenish) or less (reddish black) proportions of hyaloclasitic material altering to clay with less hyaloclastic rich lava.

From the Pindos, Greece. Width of sample is about 1.6 cm.