10" x 1.75"
My experience is of gleeful contrasts that we get this window into the forces of earth's molten material being metamorphosed into such contrasting forms. Mid-Atlantic Ridge rock is the basalty form and Havre volcanic pumice-mud is the silica-rich form. The rock slurry from Kane Fracture Zone is on the chattered pattern interior and back. Warm speckled areas are Havre mud.
Learn more about the geophysical investigations of this pumice-mud glaze.
Center of seaglass.