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Early Paleozoic - Geology 109 Lab Exam Review Early...

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Geology 109 Lab Exam Review 02:45 Early Paleozoic  Stomataolite Organic sedimentary structure Produced by cyanobacteria A large mound of bacteria Is a large dark rock, and if you crack it open will see horizontal lines parallel to  the ground  Archeocyathanc CUP ANIMALS o Filter feeding  o Only in the CAMBRIAN o Hallow in the middle o More like a sponge
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Astraeospongium Sponge Looks like a circular rock with an indented center that has stars all over it Trilobite Phacops o Large version of a trilobite o Big all over o Gigantic eyes o Was in the case
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Eurypterid SEA SCORPION Inarticulate brachiopod Shell made of CaPO4 o Made of Calcium Phosphate o There for has a WHITE coloring A brachiopod with NO hinge In other rocks, look for the shape of a brachiopod with 1 side and no hinge Articulate brachiopod Shell is made of CaCO3
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Has a hinge Has bilateral symmetry Solitary rugose coral HORN CORAL o Looks like a horn o Has a CaCO3 shell o Has radial septa o Is an EARLY PALEOZOIC INDEX FOSSIL Colonial rugose coral Has tetracoral Has well developed radial (circular) septa A distinct wall around each polyp
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Tabulate Corals Halysites  o CHAIN CORAL Looks like a thin chain of coral that has been partially filled in Favosites o HONEYCOMB CORAL Looks like a honey comb
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