Axeman has it right. They are distress flares. Usually carried by boaters. I'd still be sh#tting my pants if I came across them whilst digging a hole though. I would have assumed the worst and left them in situ. No second chances with the real stuff. Regards Russ.
I live on the south coast of NSW and have been prospecting for 20 years. Work has kept me tied up for the past couple of years so I did more urban mining than prospecting. Collecting and processing gold and silver from secondary sources (you never get rid of the fever once you get it). Im...