Boxwork

In geology, boxwork is defined as a honeycomb-like structure that can form in some fractured or jointed sedimentary rocks.

In mining geology, boxwork is a set of (typically) quartz-lined cavities, retaining the shape of the dissolved ore minerals, in gossans.

According to KellerLynn, "Boxwork is a speleogen, forming when bedrock between preexisting calcite veins were preferentially weathered away as the cave developed.

"[1] Boxwork is commonly composed of thin blades of the mineral calcite that project from cave walls or ceilings that intersect one another at various angles, forming a box-like or honeycomb pattern.

These boxwork deposits consist of calcite, along with manganese and dolomite that precipitated in fractured host limestone.