Limestone Coast South Australia Limestone Coast is a GI zone in the southeastern corner of South Australia. It was declared on 27 December 1996. Regions: Coonawarra Mount Benson Padthaway Robe Wrattonbully Wines: Greg Norman Estates Cabernet Merlot Australia Estates 2004 2005 Greg Norman Estates Shiraz Limestone Coast Australia Estates 2005 Greg Norman Estates Shiraz Cabernet Limestone Coast Australia Estates 2005 Jip Jip Rocks Australia Shiraz 2006