Stromatolite Sample Set 3 Plus
Tetradium cellulosum;
Pooleville Member, Bromide Formation,
Middle Ordovician, Oklamoma
Collenia undosa;
Biwabik Formation, Precambrian, 2.1 Billion,
Biwabik, Minnesota
Coenostroma pustuliferum;
Petoskey Formation, Middle Devonian,
Petoskey, Michigan
Palm Wood; (non-stromatolite); Morrison Formation, Jurassic, Utah