Wikipedia, en.wikipedia.org/stromatolite. 1/12/14
SharkBay, www.sharkbay.org, 1/12/14
Google, www.google.com, 1/12/14
Australia Coral Coast, australiascoralcoast.com, 1/12/14
Hamelin Pool of Stromatolites, http://sharkbay.wa.gov.au/visitors/places-to-go/hamelin-pool-stromatolites.html, 1/12/14
Microbialites, http://www.dmp.wa.gov.au/5243.aspx, 1/12/14.
SharkBay, www.sharkbay.org, 1/12/14
Google, www.google.com, 1/12/14
Australia Coral Coast, australiascoralcoast.com, 1/12/14
Hamelin Pool of Stromatolites, http://sharkbay.wa.gov.au/visitors/places-to-go/hamelin-pool-stromatolites.html, 1/12/14
Microbialites, http://www.dmp.wa.gov.au/5243.aspx, 1/12/14.