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A '''rock tile''' is a [[tile]] of [[rock]] on the ground that. On rock tiles you can [[prospect]] for ore, when mined at least 50 times (including the times chipped at)create [[mining|cave entrances]], will create and terraform it. Rock tile terraforming with a pickaxe works in the same way as [[cavedigging]] entrancedirt. Stand on the corner you want to ''lower'', activate a pickaxe, right-click a rock tile, and select ''Mining surface rock tiles will yield some ''. Every few actions you ''lower'' the corner by 1 dirt.  You can not raise a rocktile, but you can raise the corner by dropping [[dirt]] or [[heap of sand|sand]] on it is much more efficient to mine inside caves.