Materials list Tony reports from burnt-mound excavations / alkaline springs: wood ash, chert, clay, sandstone, bone ash, limestone/chalk (Mg carbonate noted), spring water. Equal-ish starting parts for exploratory mix.
Materials list Tony reports from burnt-mound excavations / alkaline springs: wood ash, chert, clay, sandstone, bone ash, limestone/chalk (Mg carbonate noted), spring water. Equal-ish starting parts for exploratory mix.