Even the pattern of perforation on some cladding panels on the South Australia Drill Core Reference Library calls to mind the core drilling process – both in that the perforations are made from holes themselves and also because the pattern reflects

Even the pattern of perforation on some cladding panels on the South Australia Drill Core Reference Library calls to mind the core drilling process both in that the perforations are made from holes themselves and also because the pattern reflects the leaching process from mineral to stone.