..... they mean these things!!!! I just thought for anyone who is new to this and wondering exactly what rock they are pulling out of the ground in new estates, this might be an eye opener.
These pics were taken at an outer Melbourne Estate.
http://i519.photobucket.com/albums/u353/joles_photo/2009-03-12_12-58-58_12032009650.jpg
http://i519.photobucket.com/albums/u353/joles_photo/2009-03-12_12-58-35_12032009649.jpg