4.75" x 2.5"
Thanks to Dan Lizzaralde, who spoke about subduction and used these four "f" words that well describe some subduction forces. The Costa Rican sediment is the exterior lower two-thirds. The fine-grained sediment was applied evenly and then contracted on drying and during firing relaxed down onto the clay leaving spaces, and creating this pattern.
Interior shiny brown assembled from refined materials. Blue glass in the thumbwell.