http://www.palaeos.com/Invertebrates/Porifera/Stromatoporoidea.html
http://www.mpm.edu/collections/learn/reef//stromatoporoids.html
The oldest Ordovician stromatoporoids from Australia
The Oldest Macroborers: Lower Cambrian of Labrador
http://www.sciencemag.org/cgi/content/abstract/197/4307/980-a
TOUR COURSE
"Evolution of Life on Earth"(3)
Historical Geology
http://74.125.77.132/search?q=cache:OGjmzBxCoMUJ:www.geol.umd.edu/~tholtz/G102/102x2r08.pdf+oldest+stromatoporoids&hl=et&ct=clnk&cd=33
http://inlinethumb21.webshots.com/42068/2198606480100806216S500x500Q85.jpg
Historical Geology
http://74.125.77.132/search?q=cache:OGjmzBxCoMUJ:www.geol.umd.edu/~tholtz/G102/102x2r08.pdf+oldest+stromatoporoids&hl=et&ct=clnk&cd=33
http://inlinethumb21.webshots.com/42068/2198606480100806216S500x500Q85.jpg
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