13" x 3.25"
Says: Earth covered by ice 635 million years ~ still spinning ~ hard crust around a molten core. HERE: basalt and glass center framed by subducting residue, spreading crust, "ALL" mud and Namibia (arrow points to rock powder on the rim).
I have a photo of this before firing and the center is red glass and basalt granules. The back is "ALL" (dips into buckets from north, south, east, west plus siliceous and carbonate materials) applied thinly.
Glaze on rim that's matte white and green, assembled from refined materials.