13" x 3"
Brown interior sediment is from the core sourced from an area described to me as an accretionary prism -- words that became a question I asked to many geologists, "What is an accretionary prism?" I got many answers, including a denial tyhat there is one in the Costa Rican subduction area. Regardless, intense pressure of plates grinding might account for this finely-grained sediment that I apply evenly and that later contracts during firing and relaxes back down into this pattern.
Other glazes assembled from refined materials.